Peripheral, by William Gibson

This was a little hard to get into, but I'm glad I got there. Gibson tends to write sparingly, not bothering to explain what things are, or what (made up sci-fi) words mean (e.g. assemblers, cosplay, well, read the review I've linked below, that guy did a better job than I will of explaining this problem) and while frugality is generally a good policy when spraying words upon the page, sometimes I could use just a little bit of guidance, like, what the fuck was that?

All in all, this is a terrific book. Once I got past the abovementioned initiation phase, it was a page-turner, and I was sorry when I got to the end.

There is time travel, of a sort, and some thoughts about the paradoxes that come from that. When Gibson's future characters meddle with the events of the past (the future people are in London, the past people in America, maybe East Kentucky?), it creates a "stub" of time-continuum. That is, a new branch grows away from the future inhabited by the meddlers. A nod to the alternative universe concept.

A review in The Guardian