Hi. To answer the first question, there's no explicit voting option. A book gains points everytime it's added to someone's shelf. So, no downvotes either.
As for sorting by points, I was hoping to add that when I implement search.
I agree, I should probably make the "legally" more explicit :) It's already in the title though.
Do you mean "legally" is in the title of web page, or of the HackerNews post? I see it on HN, but not on the website.
Btw, I'd like to echo someone's request for an RSS feed. I'd love to see when new books are added, and I wouldn't mind if you had ads or affiliate links to Amazon for hard copies in those updates.
As for sorting by points, I was hoping to add that when I implement search.
I agree, I should probably make the "legally" more explicit :) It's already in the title though.