I love The Giver too! It's short enough to where I can read it in a day if I'm not disturbed, and I have read it 3 times now, I think, and keep feeling like reading it again!

My other favorite books are The Mists of Avalon, The Island of the Blue Dolphins (which I've probably re-read more than any other book!), The Harry Potter series, and Artemis Fowl series.