We now have a new story called "Expedition Z" by James Renner, whose book "The Man From Primrose Lane" has been acquired by Warner Bros to be made into a movie with Bradley Cooper.
Twenty years after the outbreak, two young cadets are sent on a mission west, to document survivors. A post-apocalyptic Lewis and Clark, in a country destroyed by zombies.
It has been four decades since the Company was brought down, an organization that used volunteers to create a people that are called demons. One day our hero is contacted by them, and a struggle to find out who runs it and what they want begins.