The Hollow Man: As seen in KNIVES OUT: WAKE UP DEAD MAN

John Dickson Carr was a master of the locked room mystery ... 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
Very few detective stories baffle me nowadays, but Mr Carr's always do
A key influence on Wake Up Dead Man ... It's renowned for both the ingenuity of its central locked-room mystery - whereby a murderous visitor seemingly disappears into thin air - and a fourth-wall-stretching speech by sleuth Dr Gideon Fell, who lays out the various methods often used by writers to explain such "impossible crimes".
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
The best Carr is the most ingenious, and my vote would go to THE HOLLOW MAN ... The conjuror's illusion here is marvellously clever
Probably the most ingenious of all detective story writers in the creation of puzzles
No one in the history of the genre could match him for sheer sustained ingenuity when it came to devising reader-bamboozling locked rooms and other impossible crimes
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 BIG ISSUE IN THE NORTH