I switched on the bedroom light, casting a glow across the apartment. No one was there. But then the locks on my front door caught my eye. I thought I'd locked them both, but now one was open...When I moved into the apartment with my little daughter Lily, it was meant to be a new beginning for us. We would be right in the heart of downtown, in a building with its own doorman. For the first time in a long time we were safe, away from my ex-husband.But just as we settle into our new lives a letter arrives for someone called Annie. The neighbors tell me to ignore it. She's just the woman who lived here before me, who moved out one day without a word.Curious, I open it anyway and am shocked by what I read. It says Annie wasn't safe. It said she needed to get out.Now, I can't escape the idea that someone is watching us. I feel I can't trust my neighbors.And I can't help but think... Something happened to Annie. Something bad. And Lily and I are not nearly as safe here as I thought we were...A totally unputdownable gripping thriller, perfect for fans of Lisa Jewell, Shari Lapena and Gillian Flynn.