When I was in high school, I became fairly obsessed with the Dune novels by Frank Herbert. I loved how philosophical they were, and how the story, while enthralling, was about more than simply plot. It was about subtle ideas about society, religion, power and the nature of humanity.

Anyway, there was an amazing book about Frank Herbert in the Jacksonville High School library, titled simply "Frank Herbert." It's out of print now, but the author has an online version here. It's well worth reading if you liked the series.