Everyone has a friend like Carl.

The friend you can't say no to.

The friend you have to say no to.

I'm finally in a good place. A lovely home. A steady job. And Jason. Reliable, honest, kind Jason - my boyfriend. My best friend. I trust him implicitly.

But if anyone can lead Jason astray, it's Carl. His best friend.

And now Carl's on our doorstep. Begging for help.

I warn Jason not to get involved. But Carl has a hold over my boyfriend that I don't understand. And suddenly everything I hold dear is under threat.

My home. My relationship. My life.

Because Carl knows Jason owes him. And he won't leave us alone until he has what he wants.

I'll do anything to protect Jason - even from his best friend.

Fans of Gillian Flynn, T.M. Logan, B.A. Paris, Liane Moriarty, Claire Dyer, Sam Carrington, Celeste Ng will devour this stunning psychological thriller.