The Secret Hangman (Peter Diamond‪)‬

An Independent Mystery Booksellers Association Killer Book

Delia Williamson, a waitress and mother of two young girls, is reported missing.

She is soon found in a public park, hanging from the crossbar of a children’s swing set. The postmortem reveals that she has been murdered. Her current partner, ex-husband, and a traveling salesman who frequented her restaurant are all suspects.
Before Detective Superintendent Peter Diamond can solve the mystery, more will die. But even as he pursues a killer, he finds himself pursued by a secret admirer.

“Lovesey deftly blends suspense and humor in this excellent ninth whodunit to feature Peter Diamond … This classic series is still going strong.”—Publishers Weekly, Starred Review