Do Me a Favour - Drop Dead — James Hadley Chase

Keith Devery, burdened with a criminal record, arrives in Wicksteed, a prosperous little town on the Pacific coast. He is looking for any job that will provide eating money. It is when he meets Beth Marshall - whose husband, a local drunk, is to inherit $1,000,000 - that he realises there's a way to get back in the big league. Together they ruthlessly plot the perfect murder, but Keith soon finds himself at the centre of a double-bluff. Beth has plans of her own once the money is hers ...