The Drift by C. J. Tudor

 This is a mostly mediocre little post-apocalyptic novel, where all the bad that happens is due to people being shits, where there's precious good to be seen. That it happens in three timelines is "cleverly" hidden by the author most of the way through the novel; what seems like three plotlines that will converge is in fact one timeline told out of order for what I'm sure are reasons. Probably so that when the three POV characters die we get all of their experiences of crossing the veil. Because that's awesome. And what happens at the beginning of the novel's text happens after the end of it, because Ms. Tudor thinks that's clever--and it might be, if any of what happened in the novel mattered in the world of the novel; it doesn't, it isn't