Grandad's Island by Benji Davies.
At the bottom of Syd's garden, through the gate and past the tree, is Grandad's house.
Syd can let himself in any time he likes. But one day when Syd comes to call, Grandad isn't in any of the usual places. He's in the attic, where he ushers Syd through a door, and the two of them journey to a wild, beautiful island awash in color where Grandad decides he will remain.
So Syd hugs Grandad one last time and sets sail for home. Visiting Grandad's house at the bottom of the garden again, he finds it just the same as it's always been - except that Grandad isn't there anymore. Sure to provide comfort to young children struggling to understand loss, Benji Davies's tale is a sensitive and beautiful reminder that our loved ones live on in our memories long after they're gone.