Locked room mysteries—where the door has been locked from the inside and it appears that no one else has been in the room—are particularly baffling. And Golden Age authors were especially skilled in constructing them, from Anthony Boucher's intriguing science fiction twist in "Elsewhen"; to Erle Stanley Gardner's "The Exact Opposite," featuring villainous pop culture icon Lester Leith; to Ellery Queen's eerily sinister and uniquely intoned "The House of Haunts." These stories and more (fourteen in total) appear in this distinguished collection, and each one is unique, curious, and seemingly impossible. Prepare for unending bewilderment!