The Devil's Home on Leave — Derek Raymond

A man's corpse is discovered in a London warehouse, bundled into five shopping bags. Our nameless narrator from the Unexplained Deaths division of the Met is put on the case. As he probes a world of horror in South London, a terrible secret from his own past emerges, and he uncovers much more than the murderer. Derek Raymond is the father of British noir and much admired by a new generation of crime writers. He died in 1994.