It's impossible to know what's going on behind the wall. Your neighbor told you she didn't want your six-month-old daughter with her for the evening. Not for personal reasons, but she just couldn't stand her crying. Your husband said everything would be fine; your houses were right next door, and you'd both use the baby monitor, taking turns checking back every half hour. Your daughter was asleep when you last checked on her, but now, as you hurried upstairs into your eerie, quiet house, your worst fears were coming true. She was gone. You'd never had to call the police before, but now they were in your house. What would they find? What do you do when you're dealing with events that are too much to bear? Marco and Anne go to the next door for an evening out and return to find their only child missing. The tragedy forces them to confront many fears and raises many questions that peel back the layers of delusion that families—especially wealthy ones—live in. (Translator) "Her thoughts raced and became less rational; her thoughts took over. In situations like these, you don't lose your ability to think logically; sometimes things make more sense. You live in a dreamlike logic where you don't see how strange and irrational something is until you wake up." - Next Door. The New York Times bestseller, in record time. "The shocks of the plot will follow as fast as you can turn the pages." - People. "Gripping and shocking." - Lisa Gardner, New York Times bestseller. "I read this book in one go, so gripped by the pacing and the suspense, which is beautifully and boldly told!" – Sue Grafton, New York Times bestselling author of X. “Where's the Child?! It's easy to grip and read to the end, and there are shocks of sheer intelligence waiting to happen.” – USA Today. “I thought reading books in one sitting was a thing of the past. It isn't.” – Linwood Barclay. “Gripping and utterly realistic, the plot twists will shock you.” – Daily Mail. “With characters behaving in the worst possible ways and a plot that races to a massive climax, you just have to read on.” – Stylist