Steven Karl Zoltán Brust is an American fantasy and science fiction author of Hungarian descent. He was a member of the writers' group The Scribblies, which included Emma Bull, Pamela Dean, Will Shetterly, Nate Bucklin, Kara Dalkey, and Patricia Wrede, and also belongs to the Pre-Joycean Fellowship.

He is best known for his novels about the assassin Vlad Taltos. His novels have been translated into German, Russian, Polish, Dutch, Czech, French, Spanish and Hebrew, as of 2006. Agyar has two different French translations. Most of his short stories are set in shared universes. These include Emma Bull's and Will Shetterley's Liavek, Robert Asprin's Thieves' World, Neil Gaiman's Sandman and Terri Windling's Borderland Series.