Yes, Jackson and Co. made 3 movies from one book. It’s not so hard to understand when you can interpret the heavenly music of the Ainur. That holy music makes this sound, “Cha-Ching!” It worshiped amongst the lower men of Hollywood.
My son was giving me daily updates while reading the book. So we already know how the third movie is going to end. But it will be a good father/son activity when the movie is released in a couple of weeks. We can critique the movie together.