Yucatan Blue: A Tiller Galloway Underwater Adventure

A new thriller from the USA TODAY-bestselling master of undersea adventure

Tiller Galloway, black-sheep hero of HATTERAS BLUE, BAHAMAS BLUE, LOUISIANA BLUE, and DOWN TO A SUNLESS SEA, is back! When the IRS begins asking how a blue-collar oilfield diver and ex-con drug smuggler ended up so filthy rich, Galloway heads to Mexico with his son Max.

There, July Toll, whom Tiller knew from cave diving in Florida, has been hired to help hunt for a mysterious "Site X," associated with the collapse of...