It would be tricky, because the nature of my non-fiction collection (and DW) is that there would be a lot fewer books, proportionally, that people have heard of. And you don't have to know the book to vote on it, but most people seem to want to!

I'm thinking maybe instead of voting on books, you would vote on a section of the Dewey Decimal System, and then I have to pick one book out of that section to read & respond (and decide if there are any I should get rid of.)