This is the sixth book in the LET'S GO FLY series of six picture books that follows the aviation adventures of a boy and his Grandpa. For children aged two and older, the series tells the adventures of Billy and Grandpa in an airplane, a helicopter, a glider, a hot air balloon, a seaplane, and a twin-engine airplane. Grandpa is the pilot, and he explains the art of flying to Billy, and he often gives his grandson copilot duties. They are joined by...