From the bestselling author of What You Did comes a chilling story about a missing girl and two potential witnesses. They both think they saw her. But can they trust their own eyes? Mary hasn't slept in what feels like years. Her two young children never let her rest, and so one exhausting night, in the middle of a London heatwave, she escapes to a nearby park for some air. Tim can't sleep. It doesn't feel safe after the...