Two brilliant women--a serial killer and her therapist--play "a brilliant game of cat and mouse" in this twisty psychological thriller for fans of Ruth Ware and Alex Michaelides (The Times)

It all started with a telephone call. It was the first time I heard Ida's voice, just a faint whisper, as though she were calling from beyond the grave.

Renowned therapist Clarissa Virtanen is not afraid to look at the darkest side of humanity. Haunted by the death of a young patient, she will do whatever it takes to save the most vulnerable.

But when Ida - angry, damaged and seemingly suicidal - walks into her office, Clarissa may have met her match. For Ida has secrets.

Murderous secrets, which mark her like a bloodstain. Secrets which drive her to kill. And kill again.

Somehow, Clarissa must find the key to unlock her past. So she makes a bargain with Ida - six months to try and stop her taking her own life. But what if she has entered a game more deadly, and more evil, than she could ever imagine?

Don't miss this dark and twisty psychological thriller featuring a face-off between 2 women that's overlain with a sense of poignancy about damaged lives, the power of the imagination to trick-and protect-us, and the passage of time.