The Doomsday KeySigma Force Series
A Sigma Force Novel (Sigma Force Series Book 6)
A geneticist, an archaeologist, and a senator's son are murdered, each marked with a Druidic pagan cross on their flesh. Commander Gray Pierce and Sigma Force uncover a centuries-old secret hidden within a cryptic medieval codex, leading them on a race against time to save the world from an apocalyptic prophecy. From the Roman Coliseum to the lost tombs of Celtic kings, this nail-biting suspense combines cutting-edge biotechnology with historical mystery. Will Gray sacrifice one of the women by his side to save the future? Find out in this adventure of a lifetime.