Two BBC Radio full-cast dramas from the master of classic crimeAnthony Berkeley was a journalist, novelist, and founding member of the Detection Club - whose members included Agatha Christie and Dorothy L. Sayers - and was one of crime fiction's greatest innovators, developing the idea of the psychological crime novel in the 1920s and 30s. One of his recurring and most-beloved characters was Roger Sheringham, a novelist and amateur detective.