The magical new novel from the number 1 bestselling author of PS, I Love You, Where Rainbows End and If You Could See Me Now.

Ever since the day her classmate Jenny-May Butler 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 Donal who vanished into thin air a year ago. So then he spots an ad for Sandy's missing persons agency, he's certain that she will answer his prayers and find his missing 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.