From the #1 New York Times bestselling Grand Master of Adventure Clive Cussler comes a breathtaking thriller from the Numa Files series about a primitive Brazilian tribe whose secrets could save the world from the billionaire tycoon set on destroying it. An investigation into the sudden deaths of a pod of gray whales leads National Underwater & Marine Agency leader Kurt Austin to the Mexican coast, where someone tries to put him and his mini-sub permanently...

A Japanese cargo ship cruises the eastern Atlantic near the Azores when it bursts into flames. A gang of pirates speeds to take advantage of the disaster when their boat explodes. What is happening in this part of the world? As Kurt Austin, Joe Zavala, and the rest of the NUMA Special Assignments Team rush to investigate, they find themselves drawn into the extraordinary ambitions of an African dictator, the creation of a weapon of almost mythical...

On a NUMA training mission in the Caribbean, Kurt Austin and Joe Zavala catch a distress call from a nearby freighter. Leaping into action, they locate a damaged vessel and a dead captain clutching a shotgun. While searching the freighter for clues, Kurt and Joe are ambushed by crew members who seem terrified and disoriented, almost brainwashed. The trawler they were hauling has vanished, taken, the men say, by baffling lights that circled the ship....