The Adventures of Philip Marlowe was a radio series featuring Raymond Chandler's private eye, Philip Marlowe. Robert C. Reinehr and Jon D. Swartz, in their book, The A to Z of Old Time Radio, noted that the program differed from most others in its genre: "It was a more hard-boiled program than many of the other private detective shows of the time, containing few quips or quaint characters." Despite the program's popularity, it had no sponsor for most of its time on the air. The lone exceptions were when Ford Motor Company and, subsequently, Wrigley's Gum sponsored it during part of 1950.