Substance is style
Even though August is winding down, it is still summer, and you still need some fun stuff to read. If you haven't read the Harry Potter books yet, they make good bedtime reading. I think the series is overhyped, and I like the earlier books better, but they're fun. You can buy them on the cheap at amazon, but I never did. Libraries all have a billion copies, and and some of your friends certainly have copies they could lend you.
Another good choice is The Life of Pi, by Yann Martel, which is intriguingly written and a delightful story. I don't know of anyone who read it and didn't like it. This one is definitely worth investing in!