In regards to the prior posts, I was able to read any book in our house when I was growing up. I started reading sci-fi and Ian Fleming (James Bond) in the 1st and 2nd grade. My mom and dad quizzed me on what the book was about, and asked me if I enjoyed them. I never limited my sons on their reading, either. They didn't like to read when they were young, but discovered Stephen King, Dean Koontz, and JK Rowling. They'd even buy one copy and send them through the mail to the others.
After many years of reading just to read, I am now enjoying Christian, mysteries, biographies, romance, and suspense. I recently finished re-reading Charles Dickens.