This "alarming, believable, and utterly consuming" (bestselling author Dan Brown) thriller from the New York Times bestselling author of the Natchez Burning trilogy and the Penn Cage series explores the terrifying possibility that the next phase of human evolution may not be human at all...

Trinity. The government's top-secret supercomputer is an intelligence beyond comprehension—and a nightmare beyond humanity's worst fears. At the heart of a maelstrom of limitless science and ruthless ambition, Dr. David Tennant, Project Trinity's ethicist, harbors a lethal secret: he knows who murdered a fellow scientist. Fleeing for his life alongside psychiatrist Rachel Weiss, the only hope for survival lies in revealing the shocking connection between Trinity's apocalyptic power and David's tortured mind. Mankind's future hangs in the balance—and the price of failure is extinction.