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Cover of Earth X (2005), hardcover collected edition.
Art by Alex Ross.
|Created by||Alex Ross
|Formats||Original material for the series has been published as a set of limited series.|
|Publication date||Earth X
March 1999 - June 2000
September 2000 - November 2001
April 2002 - November 2003
|Number of issues||Earth X
|Artist(s)||John Paul Leon|
|Earth X Hardcover||ISBN 0-7851-1875-6|
|Universe X Volume 1||ISBN 0-7851-2413-6|
|Universe X Volume 2||ISBN 0-7851-2414-4|
|Paradise X Volume 1||ISBN 0-7851-2415-2|
|Paradise X Volume 2||ISBN 0-7851-2416-0|
Earth X is a 1999 comic book limited series written by Jim Krueger with art by John Paul Leon and published by Marvel Comics. Based on Alex Ross' notes, the series features a dystopian future version of the Marvel Universe.
Earth X began in 1997 when, in the wake of DC Comics' Kingdom Come miniseries (created by Alex Ross and Mark Waid), Wizard Magazine asked Ross likewise to imagine a possible dystopian future for Marvel. Ross sketched out some ideas of what some of the most well-known Marvel characters (including Spider-Man, Captain America and the Incredible Hulk) might be like in a future where all ordinary humans had gained superpowers, and what would become of the heroes who had once been set apart by abilities which were now commonplace. The issue of Wizard which contained the Ross article (accompanied by his characteristic illustrations) sold out rapidly, and demand was so extensive that in 1999 (in affiliation with Marvel), they republished the article as a separate booklet, the Earth X Sketchbook, which likewise sold out. Taking this as a clear indicator of fan interest, Marvel commissioned Ross to create a full series based on his notes.
Plot summary 
||This article's plot summary may be too long or excessively detailed. (March 2012)|
|This section may be confusing or unclear. Please help . Suggestions may be on the talk page. (March 2012)|
Earth X is one of a number of planets implanted with a gestating Celestial egg, and the histories of many of its inhabitants vary wildly from their Marvel Universe counterparts. About ten years after the end of the heroic age, Black Bolt secretly releases the mutagenic Terrigen Mists into Earth's atmosphere, seeking to transform humanity into Inhumans so that his people will not suffer persecution. He has already blinded Uatu the Watcher to prevent the lunar-dwelling alien from witnessing his actions. As the Terrigen Mists become a permanent component of Earth's polluted atmosphere, Black Bolt and the Inhuman Royal Family leave Earth. Unable to operate his observation equipment, Uatu transports X-51 (Machine Man)—who has long since given up super-heroics to imitate the life of his human creator—to the Moon to act as Earth's new Watcher. He further removes Machine Man's human disguise and gives him a transparent body in an attempt to remove him emotionally and physically from the human race to prepare him for his role as a new Watcher. During the course of the story, X-51 gets increasingly annoyed at Uatu's assurance of the heroes' defeat.
After finally killing the Red Skull, Captain America quits the Avengers, considering himself unfit for the team. Shortly afterward, Reed Richards constructs a worldwide network of vibranium power centers to solve the looming energy crisis, but the experiment fails when one of Reed's scientists falls into the reactor, causing a worldwide explosive chain reaction.
The Terrigen Mists begin mutating Earth's human population, though much of the world blames "Plague X" on Richards' failed experiment. Benny Beckley, the young son of Comet Man, gains the ability to control the actions of others and becomes known as the Skull. Nearly all of the world's telepaths are killed by the backlash caused by Beckley's power manifestation. Sentinel City in the Savage Land serves as a safe haven for mutants. Meanwhile, Doctor Doom and Namor the Sub-Mariner attack the United Nations, where they fight the Fantastic Four. Doom is killed in an explosion along with Susan Richards. Namor kills Johnny Storm. Franklin Richards responds by cursing Namor, causing one side of his body to burst into flame upon contact with air, forcing Namor back into the ocean. A distraught Reed Richards dons Doom's armor and exiles himself to Castle Doom in Latveria, while Ben Grimm marries Alicia Masters and sires two sons, Buzz and Chuck. Soon after, the Absorbing Man absorbs the properties of Ultron, gaining a new synthetic intellect that enables him to transform into any substance at will. He attacks Washington, D.C., where he battles the Avengers. The Vision ultimately defeats the Absorbing Man by using a computer virus. Attempting to isolate the virus by turning into stone, the Absorbing Man is shattered by the Vision. During the battle, however, several Avengers are killed and Washington, D.C. is destroyed. Lord Sunfire: Emperor of Japan forms a secret pact of superheroes, entrusting each with a piece of the shattered Absorbing Man so that he can never be reassembled.
In the aftermath of Washington's destruction and the subsequent decline of industry, Osborn Industries becomes the dominant U.S. business, controlling the USA's food supply. Norman Osborn, whose mutation makes his face and head resemble his old Green Goblin mask, is thus able to assume the Presidency of the United States without an election. To secure his political power, Osborn uses alien DNA to create the Hydra—a parasite collective that mind-controls its host bodies—and grants Tony Stark (one of the last unmutated humans) political asylum in exchange for constructing robotic replicas of the fallen Avengers to battle the Hydra menace. Under Czar Colossus (aka the Iron Czar), Russia becomes the world's predominant food producer while Great Britain (ruled by King Britain) uses its navy to distribute Russia's surplus grains around the world. The Black Panther (now a man-panther hybrid) rules Wakanda (a refuge for the mutated Ani-Men) as king alongside his wife, Queen Storm.
Captain America and his partner Redwing learn that the Skull is gathering a mind-controlled army. After Redwing is overcome by the Skull's powers, Captain America retreats and joins forces with the circus performer Daredevil, who, as a result of Plague X, can recover from any injury. The duo travel the world, recruiting allies to fight the Skull. Meanwhile, the Inhuman Royal Family return from space and contact Reed Richards, hoping to reunite with their people. While trying to find the lost Inhuman nation with Cerebro, Richards discovers the true cause behind the mutation of Earth's population. The Skull's army reach New York, destroying the Hydra, killing President Osborn, and decimating Luke Cage's police forces. In the process, the Skull also telepathically enslaves May Parker, daughter of the aging and disillusioned Peter Parker. Defending the city, Captain America and his allies quickly fall to the Skull's powers. But while the Skull is distracted by Alicia Grimm's animated clay constructs, Captain America kills the would-be child dictator and liberates his unwilling followers. Before the heroes can celebrate, the cosmic Celestials arrive on Earth to germinate the embryo they had implanted within the planet eons ago. As the Celestials prepare to attack New York, Tony Stark sacrifices himself in an attack on the aliens, while Black Bolt performs a last-minute cry for help into the galaxy. The call is heard and the Celestials are repelled by the new Galactus (formerly Franklin Richards), who consumes the Celestial embryo.
After these events, X-51 tires of Uatu's pride and realizes how heartless and cruel the former Watcher truly is. He defeats Uatu by removing his source of hearing, leaving him useless. Reed converts his vibranium power network into "Human Torches", hoping to burn off the Terrigen Mists and restore Earth's human population.
Universe X 
With the Celestial embryo gone, Earth's mass is reduced, causing a shift in orbit and polarity as well as drastic worldwide climate changes. One-fourth of New York's population dies as temperatures plummet. The Tong of Creel, a cult dedicated to reassembling the Absorbing Man, begins killing those who hold his fragments. Under Mephisto's influence, Pope Immortus founds a church advocating mutant dominance of the galaxy and the destruction of Reed's Human Torches. Meanwhile, Mar-Vell is reincarnated as the child of the synthetic Him and Her, though his soul remains in the Realm of the Dead. Captain America becomes the Mar-Vell child's guardian and embarks on a worldwide quest with his new ward to obtain various items in order to deal with Earth's restless mutant population and prepare for an impending war in the Realm of the Dead. Arriving at Zero Street, the duo is attacked by the Night People, and Captain America sacrifices his life to save the Mar-Vell child.
When the Tong of Creel finally reassembles the Absorbing Man in New York, he attacks the city's Human Torch. Battling New York's heroes, the Absorbing Man absorbs Manhattan itself, adding its buildings and streets to his being, but Loki and Iron Maiden convince the villain to transform himself into vibranium and use his mass to stabilize the planet's fluctuating orbit and polarity. Meanwhile in the Realm of the Dead, Mar-Vell leads an army of deceased heroes and villains against Thanos and Death. With the artifacts collected by himself and Captain America in his possession, Mar-Vell shows Thanos how Death has manipulated him and convinces Thanos to use the Ultimate Nullifier on the entity.
Paradise X 
With Death destroyed, Mar-Vell constructs a Paradise in the center of the Negative Zone for the dead to inhabit. However, those among the living find themselves unable to die.
Meanwhile, X-51 decides that the inhabitants of alternate Earths should be warned about the Celestial embryos he believes are growing within their planets. He spreads the alarm across the multiverse by recruiting and dispatching Heralds from alternate timelines such as Bloodstorm (Ororo Monroe, Earth-1298), Deathlok (Luther Manning, Earth-7484), Hyperion (Earth-1121), Killraven (Earth-691), Iron Man 2020 (Earth-8410), Spider-Girl (Earth-1122), and Wolverine (Days of Future Past Earth-811).
After banishing the Watchers of Earth-9997 to alternate worlds with the hope that their presence will lead to the discovery and destruction of each Celestial embryo, X-51 takes his Heralds to his Earth, where he will aid each in achieving his or her wishes. In Mar-Vell's Paradise, the High Evolutionary's equipment transforms the souls of Black Bolt, Captain America, Daredevil (Matt Murdock), Dr. Doom, Giant-Man, Phoenix, and Tony Stark into the Avenging Host, charged with ushering souls from the Realm of the Dead to Paradise. Those who enter Paradise consume a piece of the Cosmic Cube, enabling them to create their own, seemingly perfect pocket reality. But as more souls enter Paradise, it begins to expand and consume entire worlds within the Negative Zone, causing Blastaar and Annihilus to attack the Baxter Building in New York.
Reed Richards, Bruce Banner, the Beast, and several other brilliant scientists convene to discuss a solution to Death's absence. They decide to access the imprisoned Jude the Entropic Man, who can turn others to dust on contact, and synthesize his essence into a chemical to end the suffering of those unable to die. With the chemical complete, Reed, growing suspicious of Mar-Vell's motives, plans to use Pym Particles to slow Paradise's rapid growth within the Negative Zone. But Mephisto frees Jude from captivity, convincing him to go on a massive killing spree. Mephisto then steers Jude to Britain, where Mephisto hopes to find the Siege Perilous, which will allow him to traverse the multiverse. But with the help of Merlin, Doctor Strange, Psylocke, and the sacrifice of a recently-resurrected Meggan, King Britain is able to slay Mephisto with Excalibur. Meanwhile, in Paradise, Reed and a legion of heroes confront Mar-Vell. After Paradise is nearly conquered in the name of the Supreme Intelligence by the arriving souls of the Kree military, Mar-Vell explains to Reed that he (Reed) is to become the new Eternity.
Using his new role as Eternity, Reed is able to put an end to the conflict and free the remaining heroes from their Cosmic Cube-induced dream-worlds, Johnny Storm being the last freed. Once this is accomplished, Mar-Vell explains to Reed that his plan is to build a galactic wall around their universe, preventing any further influence from the Celestials. Feeling that his work is not yet complete, Mar-Vell tells the people of Paradise that he is going to the source of Excalibur, which is strongly implied to be the original universe.
Characters (Earth X and Universe X) 
- Uatu - Uatu has been blinded and hasn't been able to watch the Earth for twenty years, and has become very nihilistic and callous.
- Machine Man - A transparent Machine Man has become the New Watcher after Uatu became blind, and ultimately renders Uatu useless by removing his source of hearing, annoyed at his assurance at the heroes' defeat.
- Captain America - Captain America is 100 years old. He has become a broken, haunted man who struggles to maintain hope in defending the nation whose name he bears. He bears an A-shaped scar on his forehead.
- Black Panther - Black Panther mutated and now is a Panther-Man.
- Hulk - Hulk has been separated from Bruce Banner, and Bruce is now a child while the Hulk has devolved into an ape-like creature. The Hulk serves as Bruce Banner's eyes as Bruce is now blind.
- Ms. Marvel - Ms. Marvel assisted Mar-Vell into fighting Death.
- Thor - Thor is now a woman due to Loki tricking Odin into thinking that Thor needs to learn humility in the form of a female.
Avenging Host 
After Mar-Vell had killed Death, he reshaped part of the Realm of the Dead into a paradise and selected a group of dead heroes to be its guardians called the Avenging Host where most of its members have angel-like forms.
- Black Bolt - Black Bolt and the Inhuman Royal Family tried to stop Maximus from detonating the Terrigen Crystal Bomb in Earth's atmosphere. Black Bolt secretly blinded Uatu so that he wouldn't witness the effects of the bomb. Black Bolt later died in battle against the Celestials. In death, Black Bolt became a member of the Avenging Host where he had an angel-like appearance with a skin pattern and wings that resembled his costume.
- Doctor Doom - Doctor Doom was killed in an explosion. In death, Doctor Doom became a member of the Avenging Host where he had metallic skin and bird-like wings.
- Giant-Man - Giant-Man was killed during battle with Absorbing Man where he was impaled on the Washington Monument. In death, Giant-Man became a member of the Avenging Host where he is still at giant size and had bird-like wings.
- Hawkeye - Hawkeye was mutated to have two additional sets of arms. He was killed when Absorbing Man acquired a rubber and deflected his arrows back at him. In death, Hawkeye became a member of the Avenging Host where he had an angel-like appearance.
- Iron Man - His mutation was never explored. When Tony Stark died, he became a member of the Avenging Host in the afterlife where he had metallic skin and bird-like wings.
- Matt Murdock - After he and Elektra were killed by Bullseye, Matt Murdock ended up in the Realm of the Dead. After Death was killed by Mar-Vell, Matt Murdock became a priest of the Avenging Host.
- Phoenix Force - The Phoenix Force was unable to bond with Jean Grey's body and ended up assuming her form. The Phoenix Force later sacrificed its life. In death, the Phoenix Force became a member of the Avenging Host where it had a hybrid appearance of Jean Grey and the Phoenix Force.
The Fantastic Four no longer exist.
- Mister Fantastic - Reed Richards wears Doctor Doom's armor and inhabits his castle.
- Invisible Woman - Invisible Woman was killed in an explosion.
- Human Torch - Human Torch was killed by Namor.
- Thing - Thing married Alicia Masters and they have two children, Buzz & Chuck (Brothers Grimm).
- Professor X - Professor died at the beginning of the mutations when the Skull's power manifestation caused a psychic backlash and the X-Men disbanded. His spirit later aided Mar-Vell into fighting Death.
- Archangel - Archangel lost his fortune and became a "guardian angel".
- Banshee - Banshee was killed by Black Tom Cassidy. His spirit later aided Mar-Vell into fighting Death.
- Beast - Beast's fur became white and he moved to Wakanda to work under Black Panther.
- Cable - Cable fully succumbed to the techno-organic virus and took refuge in Sentinel City.
- Colossus - Colossus became the Czar of Russia.
- Cyclops - Cyclops becomes the leader of a new team of X-Men to help Captain America.
- Dazzler - Dazzler was killed by Mephisto in retaliation of Mar-Vell killing Death.
- Havok - Havok joined his father Corsair in space following Professor X's death.
- Iceman - Iceman is trapped in his ice form and was forced to move to a colder climate. He built a city at the North Pole.
- Kitty Pryde - Kitty was killed when protecting Colossus from a bullet that was meant for him at the time when he couldn't shift to his metal form.
- Nightcrawler - Nightcrawler is a shadow of his former self. In fact, he doesn't even remember that identity. After some trickery by Mephisto, Nightcrawler has become what he always resembled, a demon. After losing his arm, Nightcrawler became Belasco: Lord of Limbo (an alternate realm sometimes referred to as Purgatory).
- Jean Grey - Jean lost her psychic powers, married Wolverine, and both have gained a significant amount of weight.
- Longshot - Longshot went missing and not even X-51 can find him.
- Multiple Man - Multiple Man ended up with the Wendigo Curse.
- Nate Grey - Nate was infected by the techno-organic virus and became Stryfe. He battled Cable and died trying to protect Madelyne Pryor.
- Polaris - Polaris left with Havok to join Corsair in space.
- Rogue - According to X-51, Rogue was killed by a kiss that killed Gambit as well. However, Beast recounts that Rogue was so grief-stricken by Gambit's death that she sought a cure for her mutant ability through Sauron (who ended up taking her life as well as her powers). The details of either of these two accounts, or if they are related or not remains to be substantiated.
- Storm - Storm married Black Panther and became the Queen of Wakanda.
- Thunderbird - John Proudstar was seen in the Realm of the Dead talking with Professor X.
- Wolverine - Wolverine has also gained weight. With help from Machine Man, he discovers that he is the descendant of Moon-Boy's species.
New X-Men 
This is the new incarnation of the X-Men that is led by Cyclops. They were former members of the second Daredevil's circus:
- Charmer - Charmer was a part of the second Daredevil's circus. She can create energy constructs in the shape of snakes.
- Dogface - Dogface was implied to be a mutated dog living in Wakanda. He was a part of the second Daredevil's circus as the Dog-Faced Boy before joining the X-Men.
- Double-Header - Double-Header was a two-headed human who was a part of the second Daredevil's circus.
- Mermaid - Mermaid was a part of the second Daredevil's circus and had mutated a fish tail giving her the appearance of a mermaid. She is able to "swim" in the air.
- Tower - Tower is a giant human who was a part of the second Daredevil's circus.
Other heroes 
- Captain Britain - Captain Britain is now the king of Britain.
- Corsair - Corsair was joined by Havok and Polaris in space.
- Daredevil II - Following the death of the original Daredevil, a man with a remarkably powerful healing factor (who the Thing believes to be Deadpool) has taken his name and performs as a circus stunt-man, using his powers to overcome even the most horrific of injuries.
- Devil Dinosaur and Moon-Boy - Devil Dinosaur and Moon-Boy are both dead and their corpses are found on the Blue Area of the Moon. It is revealed that Wolverine is a descendent of Moon-Boy's species.
- Doc Samson - Doc Samson became a psychiatrist of the Skull. He was killed when the Skull used his powers to make Doc Samson rip himself inside out.
- Doctor Strange - Doctor Strange is killed in his astral form by Clea, who then allies herself with Loki. His body is looked after by Wong. Mar-Vell later restored his astral form enabling Doctor Strange to return to life.
- Ka-Zar - Ka-Zar mutated to have the head of a smilodon.
- Luke Cage - Luke Cage still fights crime as a police officer.
- Mar-Vell - Mar-Vell is reborn as a child and goes on a crusade to gather various powerful artifacts in order to create a paradise. Captain America joins him on his quest.
- Namor - Namor was cursed by Franklin Richards for killing Human Torch. One side of his body burns when in contact with air causing him to remain in the ocean.
- Nighthawk - Kyle Richmond's eyes, given by a disguised Mephisto, allow him to see into the future. He dictates what he sees to his colleague, Isaac Christians, so that a record can be kept of what will become of history.
- Prowler - Prowler had possessed a piece of Absorbing Man following his rampage in Washington DC.
- Rom - Rom has become stranded in Limbo and is forced to fight Dire Wraiths constantly. He has become known there as "the greatest Spaceknight".
- Shanna the She-Devil - Shanna the She-Devil mutated to resemble a humanoid leopard.
- Spider-Man - Peter Parker was publicly revealed as Spider-Man and retired, figuring he was no longer needed in this world of powers. However, he leaps into action once again after his daughter had been turned into a slave of the Skull.
- Sunfire - Sunfire now rules Japan as its emperor.
- Absorbing Man - Absorbing Man absorbed Ultron's intelligence and gained a better knowledge of his abilities.
- Bullseye - Bullseye was killed when Daredevil learned the Hand's body-swapping technique.
- Doctor Octopus - Doctor Octopus was seen in Spiders Man's illusion on Peter Parker of which he took control.
- Enforcers - The Enforcers act as the bodyguards to President Norman Osborn.
- Green Goblin - Norman Osborn is the President. His face has been mutated to resemble a goblin, but he wears a mask to make himself look human. He was later killed by the Skull.
- High Evolutionary - High Evolutionary used one of his devices to convert Franklin Richards into the new Galactus.
- Immortus - Immortus is now the Pope of a church dedicated to himself.
- Jigsaw - Jigsaw had committed suicide and is living in the Realm of the Dead.
- Kingpin - Kingpin is dead and is living in the Realm of the Dead.
- Loki - Loki has figured out that the Gods (of this Marvel Earth) are nothing of the sort, but are instead long-lived mutants of incredible power who are mentally mind-locked by the Celestials into believing that they are immortal, never-changing gods so that they won't evolve further as mutants and potentially become a threat to the Celestials in the future (as was the case with Reed Richards' son Franklin, who had grown so powerful as a mutant that just by believing himself to be Galactus, gained the powers and abilities of Galactus).
- Magneto - At the time when the Terrigen Mist was in the atmosphere, Magneto thought he was getting a "mutant" brother through every mutation. Magneto manipulated the Sentinels into building a sanctuary called Sentinel City in the Savage Land.
- Mister Hyde - Mister Hyde was seen in the Realm of the Dead as one of the mindless dead. The details of his death are unknown.
- Sauron - Beast claims that, grief-stricken after killing Gambit with a kiss, Rogue turned to Sauron's draining abilites in an attempt to lose her powers, but ended up losing her life as well. Whether this is true is yet to be confirmed.
- Skull - The Skull is the main antagonist of the series. An adolescent neo-Nazi, he uses his telepathic powers to rule the world, taking advantage of the Terrigen Mists' catastrophic effects on the planet. Captain America defeats him by snapping his neck.
- Spiders Man - An African-American homeless man who mutated to a reptilian form that resembles Spider-Man's costume. He uses energy webs that can trap people in an illusion.
- Ultron - His intelligence was absorbed by Absorbing Man.
- Vulture - Vulture mutated into his namesake minus the wings. He is associated with the Enforcers.
Other characters 
- Harry Osborn - Harry was seen in Spiders Man's illusion on Peter Parker of which he gained control.
- J. Jonah Jameson - J. Jonah Jameson lost his job and the Daily Bugle went out of business when Spider-Man revealed his identity as Peter Parker. J. Jonah Jameson later mutated into a humanoid donkey.
- John Jameson - The Celestials were the reason behind John Jameson becoming Man-Wolf. John presently regulates his Man-Wolf transformations with a special device created by Reed Richards which absorbs ambient sunlight which retards the transformation into the Man-Wolf during the evening hours.
Initially, the Earth X storyline was purported as being the future of Earth-616. However, the series often substantially retconned the origins and workings of characters to better suit the story, to the point where they were no longer reconcilable with their counterparts in the mainstream Marvel Universe. One example was the revelation in Paradise X that Wolverine is not a mutant at all, but instead one of the few remaining "pure strain humans", free from the genetic manipulations of the Celestials (as well as a descendent of Moon-Boy). Marvel editors solved these discrepancies by officially declaring that anything stated in Earth X would not be considered canonical. It was also later revealed in issue #11 of Paradise X that the events shown in the series are not set in an alternative future, but rather an alternative present (the issue reveals that Paradise X is set in 2003, the year of publication).
The Paradise X series was never properly concluded, due to editorial interference midway through its publication. Due to dwindling sales, the X and A specials, which were intended to be double-sized issues, were both reduced to 22 pages and the intended ending was never used as a result. Writer Jim Krueger expressed dismay at the loss of pages and not being able to use the original ending. In the intended ending, Captain America, suspecting Captain Marvel's treachery, would have killed Marvel just as Marvel put the energy wall around the universe to keep out the Celestials and Elders. At this final moment, having ascended to the throne of Paradise, Captain America would have realized that Marvel's intentions were good. "Cap would have sat on the throne, completely unworthy of it. And this, this would have been the final testing necessary to make Cap worthy of it."
Additionally, a planned limited series, Tales of Earth X, was proposed but never greenlighted. The series, set before the events of Earth X, would have revealed the final days of characters like Professor X before the mutation that turned the world into mutants and killed all of Earth's psychics.
A one-shot called The Earth X Companion was released in 2008, containing production notes and sketches by Jim Krueger and Alex Ross as well as a short story drawn by artist Bill Reinhold detailing the fate of one of Nick Fury's Life Model Decoys.
Collected editions 
In September 2005, Marvel released a 592 page hardcover deluxe edition of Earth X. This new edition includes 12 issues of the Earth X regular series, the #0 and #X bookends, the #1/2 issue (drawn by artist Bill Reinhold), and the Epilogue. It also contains extras pulled from the Graphitti hardcover, Marvel's trade paperback and the sketchbooks.
The various volumes include:
- Earth X (hardcover, September 2005, ISBN 0-7851-1875-6, softcover, January 2001, ISBN 0-7851-0755-X, July 2006, ISBN 0-7851-2325-3)
- Universe X:
- Paradise X:
Accompanying volumes include:
- Earth X Companion (collects Earth X #1/2, background material and sketches, 200 pages, October 2007, ISBN 0-7851-2417-9)
See also 
- Marvel Encyclopedia Volume 6: Fantastic Four
- Official Handbook to the Marvel Universe: Alternate Universes 2005
- http://x-mencomics.com/xfan/forums/showthread.php?t=36989&page=4&pp=20[dead link]
- Earth X at the Grand Comics Database
- Earth X at the Comic Book DB
- Universe X at the Grand Comics Database
- Universe X at the Comic Book DB
- Paradise X at the Grand Comics Database
- Paradise X at the Comic Book DB
- Read Earth X #1 online
- Infinite Ammo: Greatest Graphic Novels Review