A shocking new thriller, packed with twists, from an outstanding new voice in fiction

Natalie’s in tears in her bedroom. She’s had a huge argument with her husband. Slowly, she realises she’s already holding a knife.

She’s telling herself she doesn’t want to do it. Not again.

Because Natalie has an awful secret. Sometimes, on her worst nights, she blacks out. She loses control.

What do you do when there’s a killer in your house, and you think it might be you?