Have you read The Giver? I read that in elementary school and it was actually my fav book for many years! I haven't seen the movie yet though.. I don't want it to shatter the memories... Like the Lord of The Rings did to me..
No, when I saw the movie was the first time I heard about it (I'm also kinda proud for remembering it, since the Hungarian title is a lot different /Az emlékek őrzője -- The Keeper of Memories/, and I only read about it in English once of twice I think).
What about LoTR? I've first seen the movies, then read the books -- several times. It was a pretty good adaptation, even with the omission of some major elements (like Tom Bombadil, khmmmm, khmmmmmm).