I tread quietly up the plush carpeted stairs. There’s no-one here to see me as Cassie and Jon’s bedroom door creaks gently open. I’ve watched them from afar for so long. Now I’m finally in their house. But there’s no time to waste. I’m here for a reason, and I’m going to get what I came for, whatever the cost…

I open the front door and there’s Amy, smiling sweetly and ready to help. She’s been a lifesaver since Jon and I moved here–from walking the dog to picking up my little son Teddy from nursery last minute. I’m so lucky we met in the playground the first day we arrived. Amy is more than just a good friend. My only friend, really.

Whenever Amy and Jon exchange glances I’m sure it seems like they’ve met before, even though Jon swears they haven’t. But then again Jon recognises lots of people from his childhood round here without truly knowing them. I’ve put it out of my mind. Just like my fear of being watched. I need to remember I’m safe now.

But today, when I turn up at Teddy’s nursery, I learn I was so, so wrong. The teacher tells me Amy picked him up an hour ago. Now they have both disappeared.

I am frantic. I will do anything to get my son back. I should have known I can’t trust anyone. Then the phone rings, and I know what I have to do…

An utterly absorbing and shocking psychological thriller with the most unexpected of twists, this novel is perfect for fans of Lisa Jewell, Mark Edwards and The Woman in the Window.