Eden (Paperback) by Andy Merritt

Deep beneath the frozen tundra of Siberia lies a secret. Hidden for millennia, its discovery forever alters the lives of a group of scientists, forcing them to face their greatest fears, and throwing them into a fight for their very survival. Sandy Martindale believes that the discovery she and her research team has made will catapult her to instant academic fame. A frozen mammoth tucked away from time beneath the Siberian ice has been discovered, complete with proof that this animal didn't die a natural death. When one of their team falls into a hole in the ice they make a startling discovery that flings them into a world of unexpected surprise and terror. Suddenly this academic exercise has become a fight for survival.