There are always going to be books that are being made into movies, and we love to read them before they get the big-screen treatment as much as you do. If you like being able to say the book was better (isn't it always?), then we have 100 novels to dive into.
See, this could be true and false. Take for example twilight. That movie series was a fail from the start when they casted plank as Bella. But then you have Harry Potter, The Lord of the Rings. Those movies are amazing, and they are very similar to the books. So, I guess it just depends on the book and movie...?