I rated a novel recently, but when I tried to remove my rating, there does not seem to be an option for doing that. The same goes for reviews, if I write a review and gave the novel a rating. It seems like I won't be able to remove the rating afterwards, I can only change it. Is there an option for that? If there is not, can it be added?
Not quite correct actually. A rate cannot be undone, (as in reset the rating). The only thing you can do is to change your rating to other number. Your review on the other hand, can be removed by hitting the "report" button on the bottom-right corner of your review, either from the novel page where your review is, or your user profile's review tab. Just ask the review to be removed. The rating however, will stay. Technically speaking, it "can" be added, though quite unlikely to be within foreseeable future.