"The Expanse" is a series of science fiction novels written by James S.A. Corey, the pen name for authors Daniel Abraham and Ty Franck. The series began with the novel "Leviathan Wakes," published in 2011, and has since expanded to include multiple novels and novellas, as well as a television adaptation."The Expanse" series has been highly acclaimed for its realistic portrayal of space travel and colonization, its well-developed characters, and its exploration of complex moral and ethical dilemmas.