John Dickson Carr was a master of the locked room mystery. In The Hollow Man, one of his earliest novels, written when he was just 29, a murder takes place in circumstances that make it seem impossible for the killer to have escaped undetected. ... The sheer ingenuity of the plot is a delight.
Carr's 1935 locked door mystery still rivals any present day crime novel and its status as a textbook for writers in the genre means it is a necessary read