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The debut bestseller has sold over 600,000 copies!

Archaeologist Leah Andrews stumbles upon something inexplicable in southwestern New Mexico: inside a dark cavern lies an undiscovered Native American cliff dwelling abandoned for 800 years. While twisting through one of the narrow underground passageways, Leah’s flashlight illuminates the remains of a violent massacre.

Ancient human remains—all slaughtered in a long-ago massacre—cover the cavern floor and several brilliantly colored granite crystals. The rare gems are native to only one place on earth: a frozen mountain range in central Antarctica. Could Native Americans have traveled to the icy continent of Antarctica 800 years before the first known human exploration?

If so, how? And why? Only one person can get Leah to those mountains in Antarctica: her estranged husband and climbing guide Jack Hobson. They make a stunning discovery at their destination that will change history and science forever.

But Leah’s team is far from the only interested party. As her secret reaches the highest levels of government, a race to seize the Russian-claimed Antarctic territory brings the world to the brink of nuclear conflict.