Gravediggers 144-158

Ian and PJ tie ropes to trees at about waist level to slow down the 300 zombies and hopefully take out the legs of a couple of them. On their fifth rope Ian notices some of the markings on the trees. They are the markings of witch like curlicues. Now that they notice them they see them all over the trees. They start moving toward where the cords of the security cameras lead to and find a huge cement wall. There is a tree next to it that is close enough to the wall to jump, but a guy comes out and pulls them in. Inside there are huts with thatched roofs and it is like a little village inside. A soldier leads them to a hut, and inside, there are white walls with TV screens all around the walls. The TV screens are attached to surveillance cameras all around the island. Also, inside of the room are O'Dean, Kendra, and this other boy that they have never seen before. Who is this boy?