Deep-sea explorer and government operative Kurt Austin must save the world from a deliberate viral outbreak in this thriller from the #1 New York Times- bestselling author In the Micronesian islands, a top-secret U.S. government-sponsored undersea lab conducting vital biomedical research on a rare jellyfish known as the Blue Medusa suddenly disappears. At the same time, off Bermuda, a bathysphere is attacked by an underwater vehicle and left helpless a half-mile below the surface, its passengers-including Zavala-left to die. Only Kurt Austin's heroic measures save them from a watery grave, but suspecting a connection, Austin puts the NUMA team on the case. Austin's team has no way to prepare for what comes next: a hideous series of medical experiments, an extraordinarily ambitious Chinese criminal organization, and a