A National Parks Thriller (Book 2)
National Park Service investigator Michael Walker is dispatched to Glacier Bay National Park in Alaska, where a team of scientists has gone missing. Meanwhile, FBI special investigator Gina Delgado is dispatched to the scene of a sunken U.S. nuclear submarine, the entire crew of which has inexplicably been killed. The connection between these investigations lies in a deadly prehistoric organism, frozen for thousands of years until global warming brings it back to life. Against that backdrop, Walker and Delgado find themselves desperately doing battle across multiple fronts against an ancient, unstoppable enemy.