suggestion:
For the power ranking to actually be a ranking and not just static, wouldn't it be better that the top 3 of this week retain their points and exposure of how many voted for them, but next week people can't vote for them; thus giving the other novels a chance to be exposed to the readers?
The week after that, the top 3 of two weeks before would be voteable once again, with the top 3 of 1 week ago being the one unvoteable, but viewable to the readers.
just a suggestion. :)