I thought this was a great book! I would recommend it if you like funny and adventure books. So, Grandpa thinks he is still in WW2, and his grandson, Jack(I think) has to pretend he is a Squadron Leader! Grandpa escapes to the museum and climbs into the Spitfire plane. Then, Jack and his Grandpa, fly the plane and the Queen of England sends some people with planes after them. You have to read it to really get the story.