A geology grad student with a spiritual bent and a mystic from the Pleistocene find a modern skeleton in ancient rock and must risk their friendship to save the world from an unexpected danger lurking within the laws of physics.
Jen Hewitt, a quiet geology graduate student, doesn't actually believe in time travel.
Were it possible, rocks from the age of dinosaurs should already be cluttered with artifacts from future time-tourists.
Nevertheless, she proves with fellow geologist Jonathan.
Double Dragon The arasmith certainty principle, paperback/russ colson
