Zom-B Underground (Zom-B, Bk. 2)

Waking up in a military complex, months after zombies attacked school, B has no memory of the last few months. Life in the UK has turned tough since the outbreak, and B is woven into life - and battle - in the new military regime quickly. But as B learns more about the zombies held in the complex and the scientists keeping them captive, unease settles in. Why exactly was B saved? And is there anyone left in the world to trust?