When Boowie reads the diary that his grandmother sends him, he learns of her childhood in World War II England when American and British soldiers practiced for D-Day's invasion in the area of her home, and about her beloved cat, Adolphus Tip, and the cat's namesake.

"1940. BRITAIN IS AT WAR WITH NAZI GERMANY. Eleven-year-old Eric practically lives at the London Zoo. And there's one animal in particular he loves to spend time with: Gertrude the gorilla. But with German bombs raining over London, Eric realizes Gertrude is in terrible danger, and together with his Uncle Sid, a keeper at the zoo, the three go on the run. But while hiding out at the seaside, they uncover a top-secret Nazi plot..."--Page [2] of cover....