This " Is a] nail-biting locked room puzzle...Carr's gift for creating a creepy atmosphere again meshes with a brilliantly constructed and eminently fair whodunit." -- Publishers Weekly, Starred Review "Who can I trust?" Love-sick Dick Markham is reeling. He's set to marry Lesley Grant--a woman whom he learns is not who she appears to be. She seems to have been associated with three poisonings, all of which were in locked...