“James Rollins knows adventure.”

-Chicago Sun Times

USING THE Doomsday Key-the newest Sigma Force blockbuster from New York Instances bestselling author James Rollins-the critically acclaimed thrill-master continues to dazzle with an electrifying mix of history, religion, science, and adventure. The hero of Map of Bones, The Black Order, and other exceptional Rollins roller-coaster trips, Commander Pierce returns to solve a centuries-old secret, one coded in prophecies of doom-in a story that supporters of Michael Crichton, Douglas Preston, and Indiana Jones will not be able to deposit!