Thanks for the heads up!

- The rankings use karma and number of mentions, which for a week basically bring books by top karma users to the top. The actual formula is:

  book_entry['rank'] = (avg_karma_count * avg_karma + book_entry['karma'] * book_entry['karma_count']) / (book_entry['karma_count'] + avg_karma_count)

- I plan to make Top 10 monthly or yearly, just wanted to see if people would like the idea at all. Seems like people like it. As a side remark I also did http://hnbuzz.com/ where you can filter, segment HN posts daily, weekly, monthly etc. It is not about books though.

- Yep the signup seems too aggressive, it will get changed :) After I clicked it away the first time it didn't bother me anymore while coding the website so I got carried away and left it as is. But it is also a learning experience to see what people think about those.

The project is totally side project, I actually do that often - build something I like to have and use a new tech to do it to learn. Drop me a mail if you want to know more.