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 a 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 - this book takes readers on an incredible journey with Spitfires over London and Great Escapes through the city in a high octane adventure full of comedy and heart.