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.