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 out of commission. Meanwhile, in South America’s lush hills, a specially assigned NUMA® team discovers a murdered body—a member of a mysterious local tribe, who live like ghosts beyond a five-part waterfall the locals call the Hand of God, and are rumored to be led by a mythical white goddess. Now they are in danger from a vicious cadre of bio-pirates intent on stealing medicinal discoveries worth millions.

Soon, Austin and his crew realize that they’re working opposite ends of the same grand scheme and must race against time to save the world’s freshwater supply from a twisted eco-extortionist. But every step toward salvation takes them deeper into a dense jungle of treachery, blackmail, and death.

Clive Cussler (1931–2020) was the author or coauthor of over eighty books in five bestselling series, including DIRK PITT®, THE NUMA FILES®, THE OREGON FILES ®, AN ISAAC BELL ADVENTURE ®, A SAM AND REMI FARGO ADVENTURE ®, and A KURT AUSTIN ADVENTURE ®. His nonfiction works include Built for Adventure: The Classic Automobiles of Clive Cussler and Dirk Pitt, and Built to Thrill: More Classic Automobiles from Clive Cussler and Dirk Pitt, The Sea Hunters and The Sea Hunters II; these describe the true adventures of the real NUMA, which, led by Cussler, searches for lost ships of historic significance. With his crew of volunteers, Cussler discovered more than sixty ships, including the long-lost Civil War submarine Hunley.