The Washington Post calls Whistle Up the Devil “dazzling” and “a masterpiece.” Publisher’s Weekly’s starred review calls it “one of the most intelligent and crafty impossible murder novels of all time.” Roger Querrin died alone in a locked and guarded room, beyond the reach of human hands. Algy Lawrence ...could not explain the mystery of this "miracle" murder. And then, faced with a second crime which could not possibly have been committed, he began to wonder, at last, if somebody had conjured up an invisible demon who could blast out locks and walk through solid walls…