The 6th extinction

A mili tary research station buried in the remote Sierra Nevada Mountains of Northern California broadcasts a frantic distress call that ends with a chilling order : "There's been a breach. Failsafe initiated. No matter the outcome : Kill us... kill us all".When park ranger Jenna Beck arrives with her search-and-rescue dog. Nikko, to investigate, she discovers that all of the scientists in the lab are dead and every living thing for fifty square miles is annihilated : animals, plants, insects, even bacteria... The land is completely sterile - and the blight is spreading.Only one team on earth has the scientific knowledge and military precision to handle this mission : Commander Gray Pierce and Sigma. As Pierce and his team race to decipher millennia-olf secrets, they face their greatest challenge yet : stopping the sixth extinction - the end of humankind.