A Case of Do or Die

Is there such a creature as a benevolent blackmailer?  It is a sizzling hot summer's evening in 1974, and the guests bidden to dine at the charming Queen Anne house in Prince of Denmark's Row find themselves unwilling and increasingly compromised prisoners of their joint bête noir Bruce Manningford.  The trouble with Manningford is that he knows so much better than they do how to run their lives--and he doesn't hesitate to tell them so.  Then an I.R.A. bomb warning closes down the area round Horse Guards, in the West End of London, and famous Colditz inmate turned M.P. Aylmer Felbrigg goes missing.  Find out how they survive the long, hot imprisonment, and why, when one of them is found dead in bed, it is, in the opinion of the rest, the wrong corpse . . .