P.D. James: Cover her Face
From the Publisher:
Sally Jupp came from the village home for unmarried mothers and seemed ideal to help Mrs Maxie run a house and look after her invalid husband. But the real Sally was very different from the docile, repentant character she seemed to be. When a murder occurs, Chief Inspector Dalgliesh arrives.
P.D. James: Cover her Face. Faber and Faber, ISBN: 0571204252 (May, 2002), 217 p., £6.99