They Never Say When is a 1944 thriller novel by the British writer Peter Cheyney.[1] It is the sixth in his series of novels featuring the London private detective Slim Callaghan, a British version of the increasingly popular hardboiled American detectives.

They Never Say When
First edition
AuthorPeter Cheyney
LanguageEnglish
SeriesSlim Callaghan
GenreThriller
PublisherWilliam Collins, Sons
Publication date
1944
Publication placeUnited Kingdom
Media typePrint
Preceded bySorry You've Been Troubled 
Followed byUneasy Terms 

Synopsis

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Callaghan is hired by a Mrs Paula Denys who claims that she paid a to steal a priceless coronet from her husband's safe. Now he refuses to hand over the stolen and is instead trying to blackmail her.

References

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  1. ^ Reilly p.300

Bibliography

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  • Magill, Frank Northen. Critical Survey of Mystery and Detective Fiction: Authors, Volume 1. Salem Press, 1988.
  • Reilly, John M. Twentieth Century Crime & Mystery Writers. Springer, 2015.
  • Server, Lee. Encyclopedia of Pulp Fiction Writers. Infobase Publishing, 2014.