Marine biologists Dom and Jake explore the deepest ocean trenches in the world, where they encounter unique sea creatures, in a book describing the history of deep sea submersibles and the sea life that lives in the deepest parts of the ocean.

While Gwin, a Fetcher, and her family defy the Devouts by sharing song and story, the Oyster's crew and the Sunkers continue fighting to bring light back to the dark world.

When NUMA Director Dirk Pitt finds a document inside an antiquated submersible left behind a century earlier by legendary detective Isaac Bell, it reopens a mystery involving an international power scheme aimed at seizing control of a rare element.

East Antarctica: The coldest, most desolate location on Earth. Two-and-a-half miles below the ice cap is Vostok, a six thousand square mile liquid lake, over a thousand feet deep, left untouched for more than 15 million years. Now, marine biologist Zachary Wallace and two other scientists aboard a submersible tethered to a laser will journey 13,000 feet beneath the ice into this unexplored realm to discover Mesozoic life forms long believed extinct...