Hunted - The New World | Book One

I don't know how to sum this up so this is just a ball park of the actual plot. WARNING: THE BEGINNING OF THIS BOOK IS KINDA DARK... THERE"S A LOT OF DEAD PEOPLE..... JUST THOUGHT I SHOULD LET YOU KNOW
Mason lives in a post Apocalyptic world, He spends most of his time in the dead woods, his only task is to survive, until the Order comes along. A man from the other side of the mountain range that separated the west from the eastern sea has brought not only an army of brutes, but his animalistic (<- apparently that's not a word) ideals with him, letting loose his men to reach havoc and "Spread the Word" of the New Orders presents, East and West of the mountains. When Mason happens across an escaped slave He Joins her fight to take down the Order, and free the world, however messed up it is, from The Orders cruelty and tyranny. Will they Survive the final battle?