i was actually about 14 or 15 when i read it..
the words are fairly simple and easy to read, so you'd think it's for younger people..
but the things it deals with, are events talked about more in high school.. if i remember correctly.
when it's somethign already being spoken about, or somethign they've already been introduced to, the book may not make such a huge impact, though it still had quite an effect on me.
i chose 12+ but feel it probably should be more 13 or so +.