Amazon.com description: Product Description: The facility lay deep in Appalachian Mountains, a secret laboratory called Coldbrook. Its scientists had achieved the impossible: a gateway to a new world. Theirs was to be the greatest discovery in the history of mankind, but they had no idea what they were unleashing. With their breakthrough comes disease. Billions are dead yet still walking. The only hope is a cure, and the only cure is genetic immunity. In the chaos of destruction there is one person that can save the human race. But will they find her in time?