The sixth gripping thriller in Lars Kepler's bestselling series featuring Joona Linna. Perfect for fans of Stieg Larsson and Jo Nesbo.

There's a face at the window.
A stranger wearing a mask stands in the shadow of a garden. He's watching his first victim through the window. He will kill him slowly, make it last - play him a nursery rhyme - make him pay.

A killer in your house.
There's only one person the police can turn to - ex-Detective Joona Linna ...