The resurrection key / Andy McDermott.

Their days of death-defying adventure seemingly behind them, acclaimed archaeologist Nina Wilde and her husband, ex-SAS soldier Eddie Chase, live like any normal family. However, when a mythical civilisation is unearthed deep in the Antarctic ice, they are drawn into a battle for control of its astonishing power. Dashing from New York to New Zealand, from futuristic Chinese cities to the outback of Australia, they soon confront the gravest threat they've ever faced. Pursued by ruthless mercenaries and a secret special forces unit, Nina and Eddie discover the clock is counting down to the extermination of all humanity.