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.

Michael "Mike" Shayne is a fictional private detective character created during the late 1930s by writer Brett Halliday, a pseudonym of Davis Dresser. The character appeared in a series of seven films starring Lloyd Nolan for Twentieth Century Fox, five films from the low-budget Producers Releasing Corporation with Hugh Beaumont, a radio series under a variety of titles between 1944 and 1953, and later in 1960–1961 in a 32-episode NBC television series starring Richard Denning in the title role.