The Best Textbooks on Every Subject
lesswrong.com
lesswrong.com
There used to be a website, one canonicaltomes.org that did these things: there was an organizational scheme in place, and a voting mechanism, and the number of votes a book received was displayed. Unfortunately it became defunct long ago. You can still browse what they had, back in early 2006, on archive.org [1]
[1] https://web.archive.org/web/20060214203037/http://www.canoni...
I agree it's very haphazard.