Mo Hayder is an uneven writer for me: some of her books are terrifying with a potent emotional kick (Birdman, The Treatment, Gone, Poppet), others fail to work - this is somewhere in between.
It's good to see the Misty Kitson story finally (finally!) laid to rest, and I'm glad that Flea Marley who's never worked for me as a character never made an appearance.
The main story is gory and scary in parts but it also feels a little half-hearted as if Hayder is writing on auto-pilot. Elements of the plot replay bits of The Treatment, and the final twist reminds me of an old Ruth Rendell whose name I don't want to mention as it would be a spoiler.
So not the best of Hayder's books, but it's good to see Jack Caffery back in a slightly edgier place than he's been in in the last couple of tales. He still has the potential to be one of the most darkly interesting protagonists in contemporary crime fiction and I hope Hayder pushes him further rather than letting him settle.
(This review is from an ARC courtesy of the publisher)