The hotly-anticipated next novel from NUMBER ONE bestselling author, David Walliams, with audio hilariously read by the author himself!

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 - 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.