The Magic of Endings — Tom Avery

Jojo Locke's dad disappeared six years ago. And what's stranger still, none of his family can really remember him, there's a hole inside each of them where Dad should be. But then Aunt Pen arrives, a real fairy, with her tricks and wishes. She tests Jojo to see how deep his courage runs and sets him off on a journey to find their memories of Dad, and an adventure far beyond what he could have imagined begins.