I haven't seen the movie yet, but I recently finished reading "The Reader", by Bernard Schlink. It is well-written, but simple enough that it is a very fast read. I read it in three days, which is an accomplishment for someone who has a hard time keeping her eyes open once her head hits the pillow. That must say something about how engaging it is.
It is not the type of book that will make you cry - I don't think the author really gets you close enough to the characters to achieve that - but it is one that will keep you entertained and will make you think. I'm looking forward to seeing the movie eventually, but I almost always prefer the books over the movies anyway. If you're looking for something to add to your nightstand pile, I'd recommend this one.