One of the most terrifying edge of your seat, chewing your fingernails books I have ever read, a couple go away to a really fancy Mexican resort for their anniversary, and as a surprise as they arrive at the hotel brother and sister in laws, work colleague's and friends all turn up to celebrate too, young daughter Samantha is only a baby asleep in the bed across the room from her is her big sister, whilst the nanny didn't turn up the family went to dinner anyway, the agreement was every thirty minutes the girls are checked on. But what nobody knows is her husbands affair with one of their mutual friends means the girls aren't checked on for an hour, and we all know how many awful things can happen in an hour, this book is a great read and truly every parents worst nightmare. I thoroughly enjoyed it!