I read this when I was about 12 or 13, and now I'm re-reading it, for nostalgia, I guess, and because I was reminded of it a few weeks back, when I saw an episode of It's Always Sunny in Philadelphia, which kind of riffs on Flowers for Algernon.
But there's something weird going on here, because I don't remember it being as PG-13 or even R rated as it is. There's a whole mess of scenes in here involving sex (nothing too explicit, but still...), which is a problem, because I sent this book to my 13 year old nephew for Christmas, and now I'm beginning to re-think how appropriate that may have been. I guess I need to get ahold of my sister and tell her she might want to check it out first.
Anyhow, if you haven't read it, I recommend this book. Superficially it's about a mildly mentally retarded man (is there a more PC way I'm supposed to say it? I feel like there is, but nothing comes to mind...) who is the subject of an experimental treatment which gives him superhuman intelligence.
His expanded brain power is wonderful, exciting and illuminating, but also alienating... none of his old friends understand him any more. He suddenly sees that the authority figures he had placed so much trust in don't really have all the anwers, ect... exactly the sort of stuff you like to think about when you're 12 or 13 and starting to catch on to things.