No Place Like Home (Remnants, #09)

Official Summary:
The Remnants are on a mission to promote peace but the Blue Meanies have created a horrifying weapon, and the peacemakers are in grave danger. Yago's plan to rule has finally taken form, and promises death and destruction to everyone in The Zone. How does this all tie into the disturbing appearance of a stranger? Who is he? Can he be trusted? And what about Violet? The secret she hides may be a clue to the 'evolution' of the human race.
Secrets will be revealed as devious plots unfold. The future of the Remnants hangs in the balance . Can Billy save them. . . . can Billy save himself?

Back-of-Book Summary:
The Remnants have decided that they've had too much fighting. Too many battles. They want to try to find a way to make peace. But the Blue Meanies have something else on their minds. They've invented an incredibly horrifying new weapon. And it's obvious they plan on using it.
The Blue Meanies are not Jobs and the others' only problem. There is a stranger among them. No one knows who or *what* he is, but everyone is being very careful. Especially Violet -- who has a secret that might be the key to where the Remnants will go from here. If they go anywhere at all. . . .