Lost Valley (Extinction Survival Series) / Walt Browning

John Eric Carver and Shrek are a retired Navy SEAL war dog team, now living in the mountains outside of San Diego. Both man and dog thought their life was now settled, finding peace on the forty acre ranch they had moved to. But life, and a mutated virus, changed all that. 

 

Now, they have to survive a worldwide pandemic. Taking refuge in a nearby Boy Scout camp, he leads a group of teens and their parents as they are forced to deal with infected creatures that are rapidly consuming the world. Will John and Shrek survive another war, or will this be the end of the line for the Seal team?