A group of interconnected friends and companions, now elderly, each receive telephone calls telling them that they must die. Not so much a warning that they are about to be murdered but that they, and of course everyone, will one day die. Memento Mori is littered with eccentric English characters, suspecting each other, bitching behind backs, planning little schemes. It is hilarious in a kind of Ealing Comedy kind of way. It was also fascinating to read about London in the early 50s, and the care of the elderly: it was always so easy for Godfrey to drive into London and park on the Kings Road, or sometimes on a lane off it in case he car was recognised; and how the elderly and the demented were kept in bed in hospital wards. The back of the book says it's a mystery that the recipients of the telephone calls set out to unravel, but really that's just the thing that links them.