The story starts out with Amanda and Clay, successful Brooklyn types, and their children as they head off to the remote reaches of Long Island to, you guessed it, leave the world behind. Those are the words from the rental ad for the house they are staying in. This first part of the story really allows you to get to know the family, and to unwind with them. There are subtleties to this first part of the book that make you take notice, such as the detailed list of chosen groceries. In a story where you know things are meant to go wrong, a list of groceries is like a hint that food supply will later become an issue. In this particular scene, Amanda is shopping for groceries during her vacation. There's no sense of precaution or urgency, which is a lovely way to build tension.