FBP: Federal Bureau of Physics, Vol. 4: The End Times: 03/12/16
FBP: Federal Bureau of Physics, Vol. 4: The End Times by Simon Oliver is the conclusion of this series. The world is coming to an and there's something afoot with the last ditch solution. While the FBP folks are going through their own X-Files type conspiracy disaster, Ina and her mother are crossing the countryside on foot trying to stay alive. To do so, they quickly realize they must travel at night, not to avoid the quantum tornadoes, but to avoid the most dangerous of humans who have come out of the fringes of what remains of society.
As described in Road Frames (review coming), Ina, her mother, and the other post-FBP refugees are in "a universe in which the very poor of any race travel as refugees living at the mercy of their machines and the police" (Lackey: 1997, p. 12).
I know the story is over and it's good and tight the way it is but Ina just shines in this last book. She manages to keep her head on straight during the worst and most trying times at the almost end of days. While she isn't the hero who saves the universe single handedly, she is one of them. And it's hinted in the coda that she grows up to do even more heroic things.