Grave descend / Michael Crichton writing as John Lange ; foreword by Sherri Crichton.
(Book)

"Leagues below the sparkling blue water of the Caribbean Sea lies the mysterious wreckage of the Grave Descend. Protected by a wall of coral reef and bloodthirsty sharks, the corpse of the sunken yacht has been deemed unrecoverable by every diver in the world. Until James McGregor is offered a shot at it. For McGregor, a thirty-nine-year-old diver with a long history of unsavory salvage jobs, it's his last chance at a big payday. But the more he learns about the wreck, the more questions he uncovers--because none of the survivors are telling the same story. How did the ship really sink? What was its cargo? And why is this whole project starting to feel like a suicide mission?" -- Provided by publisher.