Ping can hardly wait to spend another vacation at the fabulous old manor house at Green Knowe. But this summer, it seems he is not the only visitor. Hanno, a beautiful, smart, and-possibly-dangerous gorilla from the London Zoo, has gone missing. Could he be hiding in the lush gardens of Green Knowe? As the searchers draw ever closer to discovering the wayward gorilla, Ping does his best to hide his new friend-and to preserve Hanno's freedom.
