Traitor's Sun is a science fiction novel by American writers Marion Zimmer Bradley and Adrienne Martine-Barnes in the Darkover series. It was first published by in hardcover by DAW Books in 1998. The book falls in the Darkover time periods that the author called "Against the Terrans: The Second Age (after the Comyn)". In terms of Darkover's timeline, the book starts fifteen years after The Shadow Matrix, and is a continuation of that story. Source: Wikipedia (en)