A gripping psychological thriller by the Wall Street Journal bestselling author of Silent Child.

Do you ever really know your neighbours?

Hannah Abbott is afraid of the world. Plagued by anxiety, she lives an isolated, uneventful life in suburban Yorkshire. She rarely leaves her house, and her only friend is Edith, her elderly neighbour. But when the Mason family moves in across the street, Hannah's quiet life is changed forever.

They seem perfect, with their pretty teenage daughter, April, and their public displays of affection. But one day, Hannah sees April place an unsettling sign in the window, and has to make a choice.

Laura Mason is sick of pretending everything is okay. To everyone else she has a beautiful family, a good job, and a loving husband. But behind closed doors, nothing is what it seems.

A family broken by lies.

A woman traumatized by a dark past.

A child caught in the crossfire.

Who will save April?