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 contributing to the world-building and character development. The name "James S.A. Corey" was created as a single author identity to give their work a cohesive voice. The series explores complex themes such as politics, society, and human nature, set against the backdrop of a colonized solar system. Their writing has received critical acclaim and a dedicated fanbase.