Anthony Boucher 
Case of the Crumpled Knave [EPUB ebook] 

‘A fine craftsman’ Ellery Queen A cryptic telegram; a dead man; two ingenious and quite different sets of clues; and each one of the half-dozen suspects is something of an imposter . . .It was a case that staggered the imagination of everyone involved. Until detective Fergus O’Breen began to sift through the facts. And discovered that what appeared to be fact was really fiction . . . and that the real truth lay behind a whimsical legend — and another dead body.