If any of you are interested in any mathematics-related literature, there's a wonderful novel called Zero: The Biography of a Dangerous Number; it takes you through history, showing you what mathematics was available, different number systems, etc., the birth of 0, its significance, among other things, and it ends on some general relativity/string theory. I can't really do it justice with my clumsy plot synopsis, but if any of you maths fans out there are interested in reading something, it's definitely worth it.
There's a decent amount of maths in there, but nothing that's too mindblowing.
Edit: I'm a maths fan, but I was late to the game. I was fantastic at it in primary school, but I got very, very, very lazy with it in secondary school and ended up screwing up. Thankfully I've saved the game, and I'm studying it at Advanced Higher just now, and finding it very fascinating and not too challenging!