He Who Whispers
by John Dickson Carr
Category: Detective and mystery stories

"Outside the little French city of Chartres, industrialist Howard Brookes is found dying on the parapet of an old stone tower. Evidence shows that it was impossible for anyone to have entered at the time of the murder ... the mystery remains unsolved for years until a series of coincidences brings things to a head in post-war England, where amateur sleuth Dr. Gideon Fell is on the scene to work out what really happened"--Description from Amazon.com (viewed Dec. 19, 2012).