The Unicorn Murders(1935)
(The fourth book in the Sir Henry Merrivale series)
A novel by Carter Dickson
The Unicorn is a fabulous beast. But Sir Henry Merrivale knows that in an age of great impersonators a police inspector can be a secret service agent or a murderer. And then the murderer may strike, and no one knows who killed him.
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Used availability for Carter Dickson's The Unicorn Murders
July 2000 : UK Hardback
August 1972 : UK Hardback
August 1989 : USA Paperback