John Dickson Carr (born 1906), was an American author of detective stories, who also published using the pseudonyms Carter Dickson, Carr Dickson and Roger Fairbairn.
Carr is generally regarded as one of the greatest writers of so-called "Golden Age" mysteries; complex, plot-driven stories in which the puzzle is paramount. He was a master of the so-called locked room mystery, in which a detective solves apparently impossible crimes. The Dr. Fell mystery The Hollow Man (1935), usually considered Carr's masterpiece, was selected during 1981 as the best locked-room mystery of all time by a panel of 17 mystery authors and reviewers. He was also an author of historical mystery.