Okay, I think that Slave Girl of Gor is an important book in the history of erotic science fiction and fantasy, and even though it was badly written back in 1977, I was still able to get through it, and there was still some of the exotic world he had created present. And let's face it, back then it was pretty risque stuff, what with abduction and rape and Norman's endless efforts to rationalize his growing misogyny, which had been pretty muted in the earlier Gor books (which is why the first five are pretty fun to read if you want a good adventure story with some sexual naughtiness thrown in).
But then came the internet, and then the fans of the Gor novels got organized, and then Norman decided to go through his books and rework them. Since I remembered Slave Girl of Gor from the old days, I thought I'd have a look at the new version. And I read it, and I cringed, because Norman, no master of prose before, actually managed to make the writing significantly worse with his revisions, which seem to consist mostly of adding the same sort of long philosophical diatribes that doomed the books before. Now maybe I'm foolish, but I would have thought that he might have put in more sex, since the limitations on that sort of thing are much more relaxed these days than they were in the 1970's. And let's face it, if you're going to buy a book titled Slave Girl of... well anything, you're probably expecting sex, right?
To make matters worse, he actually took out some good stuff from the original; in one scene in a paga tavern, our heroine makes mention of another Earth girl who serves as a dancer in that tavern. In the original, this is one of the rare tight passages that says a lot in a short paragraph. In the new version, half of that paragraph has been taken out for no reason (if you're interested, it's on page 297 of the original and page 353 of the new version).
So why two stars? Well, the basic story is the same, even though you'll have to skim through more babble than before, and the basic story is still a decent one. But be forewarned: Norman did his readers no favors when he decided to "improve" his work.