The Flanagan Boy is a 1949 crime thriller novel by the British author Max Catto. The plot has some similarities that of The Postman Always Rings Twice and its 1946 Hollywood film adaptation.Grant p.240-41
Film version In 1953 it was adapted into the film noir The Flanagan Boy directed by Reginald LeBorg and Barbara Payton, Frederick Valk and Tony Wright.Goble p.75
References
Bibliography Goble, Alan. The Complete Index to Literary Sources in Film. Walter de Gruyter, 1999. Grant, John. A Comprehensive Encyclopedia of Film Noir: The Essential Reference Guide. Rowman & Littlefield, 2023.