It's no secret!
I read this book as a 10 year old, and reread it all through school. Now in my 40's I had to track down a copy --it was so worth it! After rereading it all these years later, I remember why it captured me way back then!
It is a wonderful story line, and I am in the process of passing it around to all of my friends now --and I can't wait for it to come back to me to be reread again!