P. D. James 
Cover Her Face 

Sally Jupp was a sly and sensuous young woman who used her body and her brains to make her way up the social ladder. Now she lies across her bed with dark bruises from a stranglers fingers forever marring her lily-white throat.Someone has decided that the wages of sin should be death…And it is up to Chief Inspector Adam Dalgliesh to find out who that someone is.From the Paperback edition.