Dune, Lord of the Rings, Chariots of the Gods (I probably don't have the credulity to reread this now, but it was fun as a kid). I read a lot, many of the ones already listed. One that stands out in particular was Peter Benchley's Jaws. I read that one because my dad thought I was too young to see the movie. After reading it, I was able to convince him (with a lot of whining) to take me. He was right (I wasn't even 10 yet). The jump scene with the severed head in the wrecked fishing boat still gets me.