You can learn a lot by reading. But we're not talking about history books or science books -- that stuff's for squares. No, we mean you can learn a lot about movies by reading their book tie-ins before you go to see them. Not only are they packed with spoilers, they sometimes have intriguing behind-the-scenes information you wouldn't know otherwise. Such is the case with the two lavishly illustrated Watchmen movie tie-in books: Watchmen: The Art of the Film and Watchmen: The Film Companion. Read on, and check out the ten (non-spoilery) things we learned about the movie from these info-packed tomes.