The Long Earth
Lana put me onto this book while on a trip to Texas, and I have to say I like it. This is very unlike the other Terry Pratchett books I've read, in that whilst it is occasionally amusing, it isn't really an attempt at humor. It is instead a relatively methodical examination of the impact of discovering a series of inhabitable earths a trivial amount of distance away from our own. I also have to say I like the ending, not in the sense of liking what happens, but in the sense that it wasn't a twee or overly convenient way to stop the book. A good read.