NEQUA or The Problem of the Ages
NEQUA or The Problem of the Ages, according to Reginald's Science Fiction & Fantasy Literature 1700–1974, is one of the first feminist science fiction books published in the United States. It was first serialized in the newspaper Equity. Two editions were published in Topeka, Kansas in 1900. The title page lists Jack Adams  as the author. Jack Adams is a pseudonym.
In the body of the work it is revealed that Jack Adams is actually a woman (Cassie) dressing in men’s clothing, who has spent several years searching for her betrothed on various ocean voyages. She is so successful in her masquerade as a male that she actually works for the ship captains. The voyage described in Nequa is to the Arctic, where the ship becomes trapped in the ice. After several harrowing adventures the ship is freed and then proceeds to sail north. The Captain of the ship, Rafael Ganoa ( Cassie’s betrothed) is amazed to find that when they reach a certain spot, which should be close to the north pole, the compasses show that the ship is suddenly traveling south.
Actually they have sailed into the inside of the earth, where they meet the Altrurians, a society which has developed into a more cooperative society than those on the outside of the earth. Individual members of the Altrurian Society describe how the evolution of Altrurian society took place. These explanations reflect Populist thought of the time with definite feminist proclivities, providing the tone of a political novel.
Jack Adams exposes his/her secret and is chastised by her betrothed Captain Ganoe as having broken several conventions that exist among the outer earth society. Jack Adams/Cassie Van Ness now called Nequa (the teacher) takes a manuscript that she has written about this voyage and leaves in one of the new aeroplanes for the outside world to have the manuscript you have been reading, published.
Compilations which have include information about Nequa, have resulted in misunderstandings about the authorship of the book. The article "New World That Eve Made: Feminist Utopias Written by Nineteenth-Century Women" authored by Barbara Quissell which appeared in Kenneth Roemers’ America as Utopia discusses A. O. Grigsby as a woman writer.
"In Science-Fiction, the early years: A full description of more than 3000 stories", Everett Franklin Bleiler gives a synopsis and lists the authors as Alcanoan O. Grigsby, a male, and Mary P. Lowe, a female.
A. O. Grigsby (Alconoan O. Grigsby) was a Populist and later a Socialist who was editor of several newspapers from the 1890s through 1900. Mary P. Lowe was an editor of The New Woman  a women’s suffrage paper and co-editor with A. O. Grigsby of "Equity", a Populist newspaper, complete editions of which are available on microfilm from the Kansas State Historical Society.
The first edition of NEQUA listed A.O. Grigsby and Mary P. Lowe as the copyright holders. There was also an explanation printed in the first edition which credits Dr. T. A. H. Lowe with the original ideas found in NEQUA.
Dr. T. A. H. Lowe studied Eclectic Medicine at the Eclectic Medical Institute in Cincinnati. NEQUA contains many ideas which are similar to other hollow earth books, particularly one titled Mizora. Mizora first appeared in serialized form in the Cincinnati Commercial, a newspaper, while Dr. Lowe was enrolled at the Eclectic Medical Institute. Two other Eclectic Physicians also wrote subterranean fiction.
John Uri Lloyd was a teacher in the Pharmacy Department at the Eclectic Medical Institute in Cincinnati. He wrote Etidorhpa which had elements of secret Masonic rituals and alchemy woven throughout the book. Cyrus Teed was also an Eclectic Institute physician who preached the existence of a world inside of the earth. He became leader of Koreshanity which built a commune in Florida.
According to Worldcat NEQUA in printed form is only owned by eleven libraries. Out of print for 115 years, interest in its political, social and economic systems have reappeared on the  internet. A third edition, published in 2015 by Green Snake Press, includes a new introduction and an epilogue, consisting of background material about the persons originally involved in the writing and publishing of NEQUA. The original copyright was held by newspaper editors and publishers who were political organizers using the printed word to further their political cause. NEQUA was published online  in 2017.
- Science Fiction & Fantasy Literature 1700–1974, Reginald, Robert, Gale Research Co. 1979, ISBN 0810310511
- "Authors : Adams, Jack : SFE : Science Fiction Encyclopedia". sfencyclopedia.com.
- America as Utopia, Roemer, Kenneth M., Burt Franklin Publisher, 1980, ISBN 0891021698,
- Science-Fiction The Early Years, Bleiler, E. F., Kent State University Press, 1991, ISBN 0873384164, page 3
- "Newspapers on Microfilm". kshs.org.
- A Profile in Alternative Medicine: The Eclectic Medical College of Cincinnati, 1835-1942, Haller,John S., Kent State University Press, 1999, ISBN 0585262209
- Worldcat OCLC 14067001
- "Nequa, or, Narratorial Reliability in a Utopia". A Study of the Hollow Earth.
- Worlcat 898746905 ISBN 978-0-9910895-0-5