The deep end

"Ahoy, mateys! Have you ever wondered what lies at the bottom of the sea? Join Brownbeard the pirate and his first mate Alan the parrot as they explore the depths of the ocean! Here, you'll find giant worms, anglerfish, vampire squid, and--The Kraken?! Not only will you learn about the unusual bioluminescent creatures who live miles below, but also about ancient undersea explorers who used huge rocks to help themselves stay below the surface, how the first submarine worked, and why it is that the water pressure at the bottom of the ocean can make bones dissolve"--Provided by publisher.