Elwyn said:
I read the first of the Lord of the Rings - too slow and cumbersome. I've read two HP books - too silly. I do like fantasy and sci-fi and well done romantic movies. Can you recommend any books?
Tolkien and JK Rowling are just the tip of the iceberg in terms of fantasy. You have been given some good suggestions by others in this thread. The "Chronicles of Narnia" were among my favorite books as a youth. The "Wizard of Earthsea" trilogy by Ursula LeGuin is excellent young adult fantasy.
However, it sounds like you are more interested in something closer to science fiction than "hard core" fantasy, since it seems like you want to give technical explanations for "magic", rather than accepting magic as a real element to the world you are building.
One suggestion is Anne McCaffrey's Dragonsong/Dragonsinger Pern novels - they have "dragons", but they aren't really dragons in the magical sense. I loved those books as a teenager and I still enjoy them today.
The following are books I enjoyed as a youth and teenager (I also enjoy both the Lord of the Rings and the Harry Potter books, so you can take my suggestions with that in mind):
Orson Scott Card's Enders novels (as suggested above - you can read a bunch of his work for free
http://www.hatrack.com/osc/index.shtml)
Zenna Henderson, "Pilgrimage: The Book of the People" ("witches" on earth)
Panshin "Rite of Passage"
"House of Stairs" (I can't remember the author)
Madeline L'Engle, "A Wrinkle in Time"
Heinlein's juveniles (e.g., "Farmer in the Sky" and "Have Spacesuit, Will Travel")
Isaac Asimov: Foundation series and his robot novels
Frank Herbert, the first "Dune" novel
Ray Bradbury "Brave New World"
Walter Miller "A Canticle for Leibowitz" (I may be spelling that wrong)
There are lots of others, but these stand out in my mind. Most of these I read as a teenager, rather than a grade-schooler.
From your other thread on the critique board, you indicate you want an "underlying meaning" that teaches the reader. For readers to take anything away from your books, they first have to be engaged by the story, so it's important to "research" the books that your audience already enjoys. Once you start looking at a variety of young adult books (not just those made into movies), you should be able to find some that you enjoy.
From my own experience as a reader, I think it's important not to underestimate the imagination or knowledge of your audience. Even as a young reader I was put off by books that did a lot of obvious "teaching" or spelled things out too simply.
The Waterloo Library has a good compilation of lists of speculative fiction for kids (
http://www.waterborolibrary.org/bklistj.htm#jspec) and young adults (
http://www.waterborolibrary.org/bklisty.htm#yaspec). You might start there.