Shawn Andre Cosby, known as S. A. Cosby, is an American author born on August 4, 1973, in Newport News, Virginia. He is renowned for his work in "Southern noir" crime fiction and currently resides in Gloucester, Virginia, on the York River.

Cosby has published four critically acclaimed crime novels: My Darkest Prayer, Blacktop Wasteland, Razorblade Tears, and All the Sinners Bleed. His works have garnered praise for their gripping storytelling and have earned him a significant place in the crime fiction genre.