One of my very favorite series (outside of HP of course) was one I read in fifth or sixth grade. It's popular to the point that I'm always amazed when someone else hasn't read it, but when I read it, I was a one-man fandom.
I honestly read The Golden Compass like four times in one year. I still love the book with the fire of a thousand suns. I have never been so disappointed in a movie adaptation as in the one for the Golden Compass. I more-or-less refuse to acknowledge its existence. Except for when I need to point out that people should totally read the books if they've only seen the movie.
The Golden Compass follows Lyra on her quest to save her best friend, Roger.
The Subtle Knife finds Lyra in a new world with Will.
The Amber Spyglass leads Lyra and Will into a world of terrible danger where everything depends on their choices.
I am obsessed with The Golden Compass. The Subtle Knife was good but not as good. And I've only read The Amber Spyglass once which I'm not sure if it's because I didn't like it or because I wasn't ready for it to be over.
I really want to reread these books. I definitely get something new from them each time. I was also shocked to find out how controversial the books are when I got to high school. I was also deeply offended by it (in the way that happens when someone takes something from your childhood and calls it "bad and evil"). I would stand up for these books to the very end, regardless of what critics say.