"Berkeley and her best friend, Garth, live on an old cruise ship, scavenging for supplies from the drowned cities left behind on the ocean floor after the sea swallowed up all the land...After awakening a Hydra, Berkeley and Garth are sent to live on a submarine, where they study and hunt sea monsters. But the Hydra wants revenge on their home ship and if it succeeds, their families will go down with it"--

"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....