The final silence / Stuart Neville.

Rea Carlisle has inherited a house from an uncle she never knew. It doesn't take her long to clear out the dead man's remaining possessions, but one room remains stubbornly locked. When Rea finally forces it open she discovers inside a chair, a table and a leather-bound book. Inside its pages are locks of hair, fingernails: a catalogue of victims. Horrified, Rea wants to go straight to the police but when her family intervenes, Rea turns to the only person she can think of: DI Jack Lennon. But Lennon is facing his own problems. Suspended from the force and hounded by DCI Serena Flanagan, the toughest cop he's ever faced, Lennon must unlock the secrets of a dead man's terrifying journal.