About the graphic novels, it's interesting, but they kind of petered out around the ROTJ release. Marvel took the first two adaptations in their own direction, with their own interpretation of the script and including many deleted scenes. The ROTJ has nearly verbatim dialogue to the movie, includes nothing that wasn't in the movie, and condenses a lot of stuff that was, making it a much shorter read. But the compiled version makes up for it by having several pages of artwork by McQuarrie, Freeborn, and others.