Brett Halliday is the primary pen name of Davis Dresser, an American mystery and western writer. Halliday is best known for the long-lived series of Michael Shayne mysteries he wrote, and later commissioned others to continue. Dresser also wrote westerns, non-series mysteries, and romances under the names Asa Baker, Matthew Blood, Kathryn Culver, Don Davis, Hal Debrett, Anthony Scott, Peter Field, and Anderson Wayne.