The eighth novel from NUMBER ONE bestselling author, David Walliams - now available in paperback!

Jack's Grandpa...

_wears his slippers to the supermarket

_serves up Spam à la Custard for dinner

_and often doesn't remember Jack's name

But he can still take to the skies in a speeding Spitfire and save the day...

An exquisite portrait of the bond between a small boy and his beloved Grandpa - ...