James S. A. Corey is the pen name of the writing duo Daniel Abraham and Ty Franck. They are best known for their science fiction series, The Expanse, which has gained significant popularity and was adapted into a successful television series. The duo collaborates closely, with Abraham focusing on the narrative and Franck handling the world-building aspects. The Expanse series, set in a future where humanity has colonized the solar system, explores themes of politics, society, and human nature. Their work has received critical acclaim for its realistic portrayal of space travel and complex characters, making them prominent figures in contemporary science fiction literature.