I consider it on a tact that is too far removed from where we eventually go in ESB to try to fit it into my understanding of 'canon'. I have fond memories of reading it because I was so hungry for more SW, and at the time it was basically it.

we first hear the term "Sith Lord" in SW:AOLS, but we don't hear it in the films until TPM...

*Whew* You threw me for a loop there with AOLS (Adventures of Luke Skywalker, right?).

Is 'Palpatine' even in RotJ? If not, then like the term Dark Lord of the Sith, it was in the books and on trading cards for decades before it appeared in film. Kind of a curiosity.