Drawing on his experiences with deep-sea diving, marine life, and historic shipwrecks, Grover spins a compelling first-person fictional adventure at sea. Wayne and two other veteran divers ignore the threatening wintry weather and the ominous absence of the dolphin family that customarily accompanies their attempts to recover treasure from a sunken Spanish galleon they have at long last discovered. Letting his excitement over their find of jewels override his good sense, Wayne finds himself separated from his boat in a storm-tossed sea amid hungry sharks. The realistic details intensify the drama as Baby, the dolphin whose rescue is chronicled in Grover's nonfiction account Dolphin Adventure (1990), comes to his rescue. (Reviewed Aug. 1996)