Revelation - The Wasteland Chronicles, #4

Alex and friends return to a Wasteland in turmoil... The Raiders are scattered, the Exiles hunted, and the feuding Vegas gangs plot one another's destruction. Makara, head of the New Angels, has the difficult task of convincing disparate groups to work together before it's too late. But as humanity fights amongst itself, the Great Blight prepares its final onslaught. And at the center of it all, there is a secret that could spell the end of the invasion.
It is a revelation only Alex can discover, and it might cost him everything...