All the Lonely People by Martin Edwards
Down-at-heel Liverpool solicitor Harry Devlin is still infatuated with his wife Liz, even though she has left him for another man. When Liz shows up at his flat, obviously frightened, Harry is only too pleased to offer shelter. But any hopes he has for reconciliation are dashed when Liz fails to meet him as planned next day. And when her corpse is discovered in a lonely alleyway, Harry's disciplined life is turned upside-down. He becomes the number one suspect. Harry's search for the truth takes him into the city's sinister underbelly of shady streets and sleazy clubs, where he confronts an obsessive killer - and has his illusions about Liz shattered forever.