Subterranean by James Rollins

Travel to the bottom of the earth to a place you never dreamed existed. Beneath the ice a hand-picked team of specialist makes its way toward the center of the world. They are not the first to venture into this magnificent subterranean labyrinth. Those they follow did not return.

Over the rocks...Across the yawning caverns...beyond the black river...You are not alone. Into the darkness where breathtaking wonders await you-and terrors beyond imagining...Revelations that could change the world-things that should never be disturbed...At the bottom of the earth is the beginning. Keep moving toward a miracle that cannot be, toward a mystery older than time.