The Number One bestselling crime thriller from the award-winning Stuart MacBride. A bloody, brilliant and brutal story of murder, kidnap and revenge.

Detective Constable Ash Henderson has a dark secret...

Five years ago his daughter, Rebecca, went missing on the eve of her thirteenth birthday. A year later the first card arrived: homemade, with a Polaroid picture stuck to the front - Rebecca, strapped to a chair, gagged and terrified. Every year another card: each one worse than the last.

The tabloids call him `The Birthday Boy'. He's been snatching girls for twelve years, always just before their thirteenth birthday, sending the families his homemade cards showing their daughters being slowly tortured to death.

But Ash hasn't told anyone about Rebecca's birthday cards - they all think she's just run away from home - because if anyone finds out, he'll be taken off the investigation. And he's sacrificed too much to give up before his daughter's killer gets what he deserves...