Founder of Journey Press, an independent publisher focused on unusual and diverse speculative fiction, three time Hugo Finalist Gideon Marcus also runs the time machine project, Galactic Journey. He is a professional space historian, member of the American Astronautical Society's history committee.

In 2019, he edited Rediscovery: Science Fiction by Women (1958-1963) a seminal anthology of some of the best works of science fiction’s Silver Age. His most recent works, Kitra and Sirena, comprise books one and two of a YA space adventure featuring themes of isolation, teamwork, and hope, and starring a queer protagonist of color.

Gideon lives in San Diego County with his writer/editor wife, Janice, and their polymath artist daughter, Lorelei…along with a cat, a snake, and an immense library. He is currently hard at work on Hyvilma, third book in the Kitra Saga.