I don't know about any teen book. I still love Diana Wynne Jones books for the same reason I loved it when I first read it: because of her ability to weave a ve

I don't know about any teen book. I still love Diana Wynne Jones books for the same reason I loved it when I first read it: because of her ability to weave a very dense-but-accessible story out of a fascinating concept. I also still love Asimov and Herbert. It depends on the sort of read it is. Ender's Game is a book that has an emotional impact on you when you first read it, but not a very intellectual one. Stories that base their punches on emotions without firm concepts don't hold up as well.