Yes, I should have read this in high school; no, I didn't do so. I was a pretty big slacker, but I'm finally starting to make up for it.
It's a good story, and well told. I was a little disappointed, though, in a way that's not really fair: There's not much more here than there is in the movie. I don't think I've ever seen a movie that sticks quite so closely to the book. The problem being, of course, that I've seen the movie half a dozen times and I'm just now reading the book. I had hoped for a lot more here, something that would take it beyond the movie. Didn't get it. But like I said, that's not really fair.
My favorite part of the book, I think, was the characters. They are so fully developed. Had I not seen the movie, I'm sure I'd still be able to picture Atticus and Dill and Jem and the rest of them. The plot itself is also interesting, though I am left to wonder why Amazon has this on their "top-selling mysteries" list—it's not really a mystery, is it? I'd have a hard time categorizing it. On the back of the jacket it says that the author considered it "a simple love story." If she actually said that, I think she was being disingenuous at best. I'm hard pressed even to find the "love story" she might be referring to (Scout & Dill? Scout & Boo?), and obviously there's a lot more going on here.