The TPM and AOTC novelizations aren't really anything like Stover's. There are a few extra scenes, but very little additional insight into character motivations or what's happening in the plot. TPM isn't too bad but Salvatore's AOTC is painfully dull. Really the only parts of it I can recommend are the additional Jango/Boba scenes. So basically I would read Darth Plagueis before bothering with either of them. As for the OT novelizations, ANH isn't bad but it's more interesting from a historical perspective than anything. The ESB novelization is pretty dull and forgettable, it's basically a direct transcription of the screenplay, although it does include a few deleted scenes like Yoda training Luke to use his lightsaber. I really, really love James Kahn's ROTJ, though. It's nothing like Stover's ROTS, but of all five other novelizations, I think it comes the closest. Kahn doesn't quite make the story his own like Stover does, and there are a few questionable parts, like how all of Chewie's and Artoo's lines are spelled out phonetically, but all the Death Star scenes are written really beautifully and I appreciate how seriously Kahn treats the story despite the movie's disappointingly silly and lighthearted tone. Highly recommended.