The Problem of the Wire Cage in paperback format by John Dickson Carr. Published by Kensington Publishing Corporation . Available in Used - Very Good condition.
John Dickson Carr was a very highly regarded American mystery writer, though he lived for most of the '30s and '40s in England, married there and set many of his books there (Wikipedia). His two main detectives, Dr. Fell and Sir Henry Merrivale, were very English (Wikipedia).
