Birdman (novel)

Birdman (1999) was the first novel of British crime-writer Mo Hayder. It introduced her protagonist DI Jack Caffery.
Plot summary.
DI Jack Caffery gets involved in a frightening case of five mutilated bodies of women whose corpses are found on the outskirts of London. His investigation yields a treasure trove of abominations. Caffery knows his department is looking in the wrong place for the perpetrator. But he cannot guess at the forces he's up against, or the true darkness of a killer's heart. The manhunt builds as a killer is cornered. The sequel is "The Treatment".