Sonata of the dead

It's four months on from the events of Dust and Desire ... Joel Sorrell has recovered from the injuries he sustained in his fight with The Four-Year-Old. A body has been found, sealed into the dead space behind a false wall in a flat in Muswell Hill. Beheaded and surrounded by bloodstained pages of typewritten text, it is the third such murder committed by a killer known as The Hack. And it may be linked to his daughter's disappearance.