By Michael Gilbert.
[a.k.a. THE DANGER WITHIN]
TIPPING MY FEDORA (25 October 2013), Sergio reviews an ingenious mixed-genre novel:
Gilbert . . . deserves great credit for his seamless blending of a fair play whodunit, impossible crime and an exciting story of wartime escape, told with a steady hand and a fine line in dry humour. There are lots of surprises in this superb and unusual book and should please even the most discerning of mystery fans.
Also see this article from THE SATURDAY REVIEW (October 4, 1952), archived here.The GAD Wiki has more.
The UNZ index lists 219 items for Michael Gilbert.
Category: Detective fiction