At Princeton University, a famed geneticist dies inside a biohazard lab. In Rome, a Vatican archaeologist is found dead in St. Peter's Basilica. In Africa, a U.S. senator's son is slain outside a Red Cross camp. The three murders on three continents bear a horrifying connection: all the victims are marked by a Druidic pagan cross burned into their flesh. The bizarre murders thrust Commander Gray Pierce and Sigma Force into a race against time to solve a riddle going back centuries.

From the depths of the Indian Ocean, a horrific plague has arisen to devastate humankind - a disease that's unknown, unstoppable, and deadly. But it is merely a harbinger of the doom that is to follow. Aboard a cruise liner transformed into a makeshift hospital, Dr. Lisa Cummings and Monk Kokkalis, operatives of SIGMA Force, search for answers to the bizarre affliction. But there are others with far less altruistic intentions.

Deep in the Rocky Mountains, a gruesome discovery - hundreds of mummified bodies - stirs international attention and fervent controversy. Despite doubts to the bodies' origins, the local Native American Heritage Commission lays claim to the prehistoric remains, along with the strange artifacts found in the same cavern: gold plates inscribed with an unfathomable script.

High in Nepal, a monastery erupts with savagery and madness. Deep in a German mine, abomination wears the innocent face of a child. Hidden in the jungles of Africa, experiments rooted in a dark past have found fertile ground again.

During a crowded service at a cathedral in Germany, armed intruders in monks' robes unleash a nightmare of blood and destruction. But the killers have not come for gold; they seek a more valuable prize: the bones of the Magi who once paid homage to a newborn savior...a treasure that could reshape the world.

In the wilds of Mongolia, a research satellite has crashed, triggering an explosive search for its valuable cargo: a code-black physics project connected to the study of dark energy...and a shocking image of the eastern seaboard of the United States in utter ruin. At the Vatican, a package arrives containing two strange artifacts: a skull scrawled with ancient Aramaic and a tome bound in human skin. DNA evidence reveals that both came from the same body: the long-dead Mongol king Genghis Khan.

Deep in the Rocky Mountains, a gruesome discovery - hundreds of mummified bodies - stirs international attention and fervent controversy. Despite doubts about the bodies’ origins, the local Native American Heritage Commission lays claim to the prehistoric remains, along with the strange artifacts found in the same cavern: gold plates inscribed with an unfathomable script. During a riot at the dig site, an anthropologist dies horribly, burned to ashes in a fiery explosion in plain view of television cameras.

An inexplicable explosion rocks the antiquities collection of a London museum and the race begins to determine how it happened, why it happened, and what it means. Lady Kara Kensington's family paid a high price in money and blood to found the gallery that now lies in ruins. Her search for answers leads Kara and her friend Safia al-Maaz, the gallery's curator, into a world they never dreamed existed.

Galilee, 1025. A cunning Templar knight uncovers a holy treasure: the Bachal Isu - the staff of Jesus Christ - a priceless icon that holds a mysterious and terrifying power that will forever change humanity if unleashed. A millennium later, Somali pirates hijack a yacht off the coast off the Horn of Africa, kidnapping a young pregnant American woman and brutally killing her husband. Painter Crowe and his SIGMA team are enlisted for the top secret rescue mission. The kidnappee is the daughter of the U.S. President.

Galilee, 1025. A cunning Templar knight uncovers a holy treasure: the Bachal Isu - the staff of Jesus Christ - a priceless icon that holds a mysterious and terrifying power that will forever change humanity if unleashed. A millennium later, Somali pirates hijack a yacht off the coast of the Horn of Africa, kidnapping a young pregnant American woman and brutally killing her husband. Painter Crowe and his Sigma team are enlisted for the top secret rescue mission.

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 semicomatose state and cannot speak - until a brilliant neurologist offers a radical approach to “unlock” her mind long enough to ask a few questions. 

If the biblical plagues of Egypt truly happened—could they happen again—on a global scale? Two years after vanishing into the Sudanese desert, Professor Harold McCabe comes stumbling out of the sands, but he dies before he can tell his story. Then an autopsy uncovers a bizarre corruption: someone had begun to mummify the professor's body—while he was still alive. Subsequently, the medical team who had performed the man's autopsy has fallen ill with an unknown disease. Fearing the worst, a colleague of the professor reaches out to Painter Crowe, the director of Sigma Force. The call is urgent, for Professor McCabe had vanished into the desert while searching for proof of the ten plagues of Moses.

Seichan is ripped out of the Sigma series for an adventure all her own - but can she survive? The beautiful and elusive assassin wakes in a hotel in Paris with a deadly electronic collar fastened to her throat. Joined by a boy who is similarly threatened, she must rescue the son of a hated enemy, who has fallen under the sway of the nefarious leader of an apocalyptic cult. To survive she must venture into the dark world beneath the City of Lights, into the infamous catacombs of Paris.

Author of numerous New York Times best sellers, James Rollins captivates listeners with his thrilling Sigma Force series. This sixth book features Commander Gray Pierce in a race against time to solve an ancient riddle - one that prophesies the world's destruction. Pierce will have to journey from the Roman Coliseum to the icy peaks of Norway to uncover the Doomsday Key in time.

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 pause-resisting thriller from number-one New York Times best-selling author James Rollins that combines cutting-edge science, historical mystery, mythology, and pulse-pounding action.