The Doomsday Key "International Edition"(Sigma Force‪)‬

Author of numerous New York Times best-sellers, James Rollins captivates readers 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.