The damage done

The Damage Done is the sixth book in the Inspector McLean series. McClean is back, working in the SCU again, and unsurprisingly, things aren't going well. A raid on an alleged brothel leaves the team with egg on their facse as it appears their tip-off was way off the mark.
There's the usual run-ins with Brooks and Spence, both of whom have been promoted, and a transfer to the newly founded Cold Case Unit.
This is quite a dark read, given that it features prostitution and child abuse. There's an air of menace throughout and a subtle supernatural undertone.
I highly recommend this series.