A redemptive and captivating novel from the No. 1 bestselling author of PS. I Love You.Ever wondered where lost things go?Ever since the day her classmate vanished, Sandy Shortt has been haunted by what happens when something – or someone – disappears. Finding has become her goal.Jack Ruttle is desperate to find his younger brother who vanished into thin air a year ago. He spots an ad for Sandy's missing persons agency and is certain that she will answer his prayers and find his brother.But then Sandy disappears too, stumbling upon a place that is a world away from the only one she has ever known. Now all she wants, more than anything, is to find her way home.