To save the world and our future, Sigma Force must embark on a dangerous odyssey into an ancient past whose horrors are all too present in this page-turning thriller from #1 New York Times bestselling author James Rollins that combines cutting-edge science, historical mystery, mythology, and pulse-pounding action.

In the frozen tundra of Greenland, a group of modern-day climatologists and archaeologists stumble on a shocking find: a medieval ship buried a half mile below the ice. The ship’s hold contains a collection of even older artifacts—tools of war—dating back to the Bronze Age. Inside the captain’s cabin is a magnificent treasure that is as priceless as it is miraculous: a clockwork gold atlas encircled by an intricate silver astrolabe. The mechanism is signed with the name of its creator, Ismail al-Jazari, a famous Muslim inventor considered to be the Da Vinci of the Arab world—a brilliant scientist who inspired Leonardo’s own work.

Once activated, the moving globe traces the path of Odysseus’ famous ship as it sailed away from Troy. But the route detours as the map opens to reveal an underground river leading to a hidden realm underneath the Mediterranean Sea. The map indicates that this subterranean world is called Tartarus, the Greek name for Hell. In mythology, Tartarus was where the wicked were punished and the monstrous Titans of old, imprisoned.

When word of Tartarus spreads—and of the cache of miraculous weapons said to be hidden there—tensions explode in this volatile region where Turks battle Kurds, terrorists wage war, and civilians suffer untold horrors. The phantasmagoric horrors found in Homer’s tales are all too real—and could be unleashed upon the world. Whoever possesses them can use their awesome power to control the future of humanity.

Now, Sigma Force must go where humans fear to tread. To prevent a tyrant from igniting a global war, they must cross the very gates of Hell.

In the race to save one of their own, Sigma Force must wrestle with the deepest spiritual mysteries of mankind in this mind-expanding adventure from the #1 New York Times bestselling author, told with his trademark blend of cutting edge science, historical mystery, and pulse-pounding action.

Arriving home on Christmas Eve, Commander Gray Pierce discovers his house ransacked, his pregnant lover missing, and his best friend’s wife, Kat, unconscious on the kitchen floor. With no shred of evidence to follow, his one hope to find the woman he loves and his unborn child is Kat, the only witness to what happened. But the injured woman is in a semi-comatose state and cannot speak—until a brilliant neurologist offers a radical approach to "unlock" her mind long enough to ask a few questions.

What Pierce learns from Kat sets Sigma Force on a frantic quest for answers that are connected to mysteries reaching back to the Spanish Inquisition and to one of the most reviled and blood-soaked books in human history—a Medieval text known as the Malleus Maleficarum, the Hammer of Witches. What they uncover hidden deep in the past will reveal a frightening truth in the present and a future on the brink of annihilation, and force them to confront the ultimate question: What does it mean to have a soul?

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?

In the remote mountains of Croatia, an archaeologist makes a strange discovery:  a subterranean Catholic chapel, hidden for centuries, holds the bones of a Neanderthal woman. In the same cavern system, elaborate primitive paintings tell the story of an immense battle between tribes of Neanderthals and monstrous shadowy figures. Who is this mysterious enemy depicted in these ancient drawings and what do the paintings mean?

Before any answers could be made, the investigative team is attacked, while at the same time, a bloody assault is made upon a primate research center outside of Atlanta. How are these events connected? Who is behind these attacks?  The search for the truth will take Commander Gray Pierce of Sigma Force 50,000 years into the past. As he and Sigma trace the evolution of human intelligence to its true source, they will be plunged into a cataclysmic battle for the future of humanity that stretches across the globe . . . and beyond.

With the fate of our future at stake, Sigma embarks on its most harrowing odyssey ever—a breathtaking quest that will take them from ancient tunnels in Ecuador that span the breadth of South America to a millennia-old necropolis holding the bones of our ancestors. Along the way, revelations involving the lost continent of Atlantis will reveal true mysteries tied to mankind’s first steps on the moon. In the end, Gray Pierce and his team will face to their greatest threat: an ancient evil, resurrected by modern genetic science, strong enough to bring about the end of man’s dominance on this planet.

Only this time, Sigma will falter—and the world we know will change forever.

The Rand scientific expedition entered the lush wilderness of the Amazon and never returned. Years later, one of its members has stumbled out of the world's most inhospitable rainforest—a former Special Forces soldier, scarred, mutilated, terrified, and mere hours from death, who went in with one arm missing . . . and came out with both intact.

Unable to comprehend this inexplicable event, the government sends Nathan Rand into this impenetrable secret world of undreamed-of perils, to follow the trail of his vanished father . . . toward mysteries that must be solved at any cost. But the nightmare that is awaiting Nate and his team of scientists and seasoned U.S. Rangers dwarfs any danger they anticipated . . . an ancient, unspoken terror—a power beyond human imagining—that can forever alter the world beyond the dark, lethal confines of . . .