The Star Wars Episode III novelization is actually pretty good. The way it covers the Anakin/Obi-Wan/Dooku scene at the beginning really fleshes things out and makes it an infinitely better scene than the one in the movie itself.
Sometimes novelizations can actually elevate above the source movie material by adding background & depth to otherwise shallow characters.
Yeah came here to mention this, the Matthew Stover novelization is probably my favorite Star Wars book.