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What was Amelia Earhart carrying on her final flight? The adventure begins two thousand feet beneath the surface of the Earth. Philip Mercer, a preeminent geologist with a taste for international intrigue and danger, rides an elevator two thousand feet into the earth at the Leister... Read Full Overview

Geologist and adventurer Philip Mercer is visiting an old friend who's working far down in Minnesota's Leister Deep Mine--but he arrives too late to save Abe Jacobs and his climate-research team from a shocking, brutal attack. Mercer vows to seek revenge as well as answers, hoping... Read Full Overview