This book is pretty short, so it manages to be quite captivating the entire time. This also means that it's possible to fly through it quickly, so you don't have to lay awake at night thinking about it... 
 Lots of twists and turns make this an exciting, enjoyable read. 
 A couple are going to their next door neighbours house for a dinner party when their babysitter cancels. Their neighbour has made it clear she didn't want them to bring their baby, and since it's only next door they decide to go anyway, bringing the baby monitor and leaving the baby home alone, one of them running back to check on her every half an hour. But when they get home, the baby is gone. What's more, when the police arrive to investigate, it becomes clear that everyone - the mum, the dad, the neighbours, even the mums parents- is hiding something. What's really going on here? And where's the baby?