Grandpa’s Great Escape, from Children's author David Walliams. Jack’s Grandpa…*wears his slippers to the supermarket*serves up Spam à la Custard for dinner*and often doesn’t remember Jack’s nameBut he can still take to the skies in a speeding Spitfire and save the day… | Grandpa’s Great Escape by David Walliams, Perfect | Indigo Chapters