The Expanse started as a series of brilliant sci-fi novels, but the live-action adaptation managed to clear up one of the more confusing aspects of the source material. The nine-book saga by James S.A. Corey (a pen name for writing duo Daniel Abraham and Ty Franck) first came to screens in 2015 when Syfy aired The Expanse season 1. Syfy canceled the show after season 3, but Amazon stepped in to make three more runs. The Expanse season 6's ending concludes the show, but there are still more books that remain unadapted.