New in paperback - the brilliantly dark and twisty psychological thriller about a serial killer in therapy.

Renowned therapist Clarissa is no stranger to the dark side of humanity. But when Ida walks into her office - angry, damaged and seemingly suicidal - she may have met her match. For Ida has secrets. Murderous secrets.

Somehow, Clarissa must find the key to unlock Ida's past and save her life. But what if she has entered a game more deadly, and more sinister, than she could ever have imagined?

Translated by: David Hackston