2 Novels — Ellery Queen

Signet Double Mysteries: A Fine And Private Place; The Madman Theory. A Fine And Private Place: Killers had challenged the master crime solver before, but none so cleverly. The 9-word clue was one of 9 cryptic notes that had been sent to taunt Inspector Queen and Ellery 9 days after the murder. The Madman Theory: When Police Inspector Omar Collins had to come up with the answer to a murder, he got a lukewarm tip from a real cool corpse. But when the second and then the third body turned up, Collins was sure he was hot on the killer's trail.