Murder Off the Record is a 1957 thriller novel by the British writer John Bingham.Reilly p.121 It is also known by the alternative title Marion.
Adaptation In 1962 the novel was adapted for an episode of the television series Alfred Hitchcock Presents entitled Captive Audience, starring James Mason and Angie Dickinson.
References
Bibliography Reilly, John M. Twentieth Century Crime & Mystery Writers. Springer, 2015.