The book provides feats, prestige classes, and other options for characters interested in playing trickster characters. It has introduced the idea of Skill tricks, which are feat-like character moves that cost skill points to learn and may only be used once per encounter.
The Prestige Classes in this book are the: Avenging Executioner, Battle Trickster, Cloaked Dancer, Combat Trapsmith, Fortunes's Friend, Gray Guard, Magical Trickster, Malconvoker, Master Of Masks, Mountebank, Psibond Agent, Spellwarp Sniper, and the Uncanny Trickster.
Some of the feats in this book have been specialized for the Sneak attack. There are also Luck feats, which give the character a reroll on certain actions in order to get a better result. There are also Bardic Music feats, which give the bard the option to use up one of his daily bard performance in order to gain specific effects.
Mike McArtor explained whether the book was aimed at just the rogue class, or to characters in general: "The book takes a broader aim for the most part, allowing all classes the chance to act a little scoundrelly from time to time (yes, even paladins!). That said, however, we did not forget the original D&D scoundrels, so we have some support specifically for rogues (and bards, ninjas, scouts, and spellthieves, as well)."