RKMBs Forums .::Robegories::. Media What are your top ten favorite books?

C.S. Lewis once said that any book worth reading is worth reading one a year. While I highly doubt that any of us are quite that avid in our reading, I am quite certain (based on this thread) that we all seem to enjoy reading on some level.

What books have either most influenced you or were just plain fun to read? If you had to make a list, which ten would come out on top?

Please list your choices (attempt to limit your choices to novels or non-fiction - no graphic novels or comics, please) and briefly describe why each made your list.