I finished reading 'Doppelganger', by Michael Parker, the school novel for this year for me. It's kind of boring at the start, but it does get pretty good towards the middle and end. I like the seperate universes concept. Short book, but it's pretty good all in all.
I also read The Curious Incident of the Dog in the Nighttime, which is a REALLY good book IMO. Good insight into other people's minds.