The Unicorn Murders

The Unicorn Murders
First edition (US)
AuthorJohn Dickson Carr writing as "Carter Dickson"
LanguageEnglish
SeriesHenry Merrivale
GenreMystery fiction
Detective fiction
PublisherMorrow (US, 1935)
Heinemann (UK, 1936)
Publication date
1935
Publication placeUnited Kingdom
Media typePrint (Hardback & Paperback)
Pages240 (Dell mapback #16, 1940)
Preceded byThe Red Widow Murders 
Followed byThe Punch and Judy Murders 

The Unicorn Murders is a mystery novel by the American writer John Dickson Carr (1906–1977), who published it under the name of Carter Dickson. It is a locked room mystery (more precisely, it is a subset of that group, an impossible mystery) and features his series detective, Sir Henry Merrivale.