A war is coming, a battle that will stretch from the prehistoric forests of the ancient past to the cutting-edge research labs of today, all to reveal a true mystery buried deep within our DNA, a mystery that will leave readers changed forever . . .

In this groundbreaking masterpiece of ingenuity and intrigue that spans 50,000 years in human history, New York Times bestselling author James Rollins takes us to mankind’s next great leap.

But will it mark a new chapter in our development . . . or our extinction?