The Strangler's Honeymoon (The Van Veeteren series)

Desperately lonely, sixteen-year-old monica kammerle has little idea of what she is getting herself into when she begins an affair with her mother's latest partner; the sophisticated benjamin kerran. Months later, when a woman's strangled body is found, the maardam police must discover who has committed this terrible crime. It isn't long before they realize the perpetrator may have killed before and is likely to do so again. Meanwhile former chief inspector van veeteren finds himself drawn into the mystery when a priest, who has learned dreadful secrets, appeals to him for help. But when the priest falls beneath the wheels of a train and the police find more dead-ends than leads, it seems van veeteren will have to come up with a new approach to unearth this dark serial killer. Before he chooses his next victim.