If you’re looking for something short and light that’s more than just fluff, check out Mark Haddon’s The curious Incident of the Dog in the Night-time. It’s a cracking good read about a 15-year-old British kid with Asperger Syndrome.
I know, you’re thinking “Why the hell would I want to read something so serious and depressing?!” But it’s not presented that way at all. It actually manages to be really imaginative and funny, without being patronizing.
It’s written from the point of view of the kid, who decides to do some detective work to find out who killed the neighbour’s dog. The chapters alternate between moving the plot forward and the protagonist’s observations on everyday life.
Anyway, while it’s a fairly quick read, you’re not gonna find a better explanation of what it’s like to live with Asperger’s (at least according to what I’ve read online). Evidently the author worked with autistic children for a few years.
Anyway, you have my recommendation. Just read it. You’ll love it.