Former British military diver Holden Cameron must investigate the suspicious activity surrounding a Donnelly dive to recover treasure from the ancient wreck of a pirate ship located near St. Vincent. When equipment, treasure, and even divers begin to disappear, owner Kate Donnelly and Holden form an uneasy alliance to uncover the truth. But the deeper they plummet into the mystery, the closer they come to each other. Soon they are sharing their deepest...

A giant shark escapes from a California aquarium, creating havoc before heading to sea. As he probes the ocean depths in pursuit, biologist Jonas Taylor stumbles on a terrorist nuclear arms factory.

"Sophia bravely dives down to discover the secrets under the sea. She encounters beautiful fish and floating forests. Farther down, the dark water is full of tentacles and treasures. Deep underwater, she is never alone. Do you dare dive down after her?"--

Two sisters vacationing in Mexico are trapped in a shark cage at the bottom of the ocean. With less than an hour of oxygen left and great white sharks circling nearby, they must fight to survive.

When a nuclear submarine mysteriously sinks, the Navy commandeers the crew of a civilian deep sea oil rig to help in the rescue operation. This perilous mission becomes a wondrous odyssey into the unknown as forces from the ocean's deepest region begin to make contact with the divers.

Sage is used to being the fastest runner, the quickest climber, and the strongest swimmer around. And she's also used to taking charge. But when the second race course has the red team diving underwater to explore the Great Barrier Reef, it's trusting her teammates that matters most. It's sink or swim time....Each chapter in this action-packed adventure series is bursting with totally true facts about wild and wonderful creatures, dangerous habitats,...

"The Oliver family found a sunken treasure ship! When they try to retrieve the fortune, they are attacked by a giant squid. Can Samuel subdue the squid so his father and uncle can get the riches? And squid don't need gold. What is the monster really guarding?"--Back cover.

When a nuclear missile sub mysteriously sinks, the Navy commandeers the crew of a civilian deep-sea oil rig to help in the rescue operation. This perilous mission becomes a wondrous odyssey into the unknown as forces from the ocean's deepest region begin to make contact with the divers.

Wayne is searching for buried treasure sunk with a Spanish galleon off the Florida coast when a storm arises and his dolphin friend comes to his rescue.

When Dorothy Ann accidentally loses Jyoti's high-tech locket in the ocean, Ms. Frizzle's class travels down through the layers of the sea to retrieve it. Includes glossary.