Includes book club questions.

"With two young children, Mary hasn't slept in what feels like years. For his part, Tim never feels safe enough to sleep. And so one hot, exhausting night, the two strangers meet while seeking solace in a nearby park. There, they witness something horrific: a violent attack in the window of a neighboring house. And when they see news reports of a missing woman who was last seen walking alone not far from them, the pair are convinced it's her they saw being attacked--no matter what the police say. But with her marriage under strain and the police on their tail, Mary begins to doubt her own mind...and Tim's. Have they got it all wrong, or is something even more sinister going on?"--,Provided by publisher.