After launching this site and a little more research, I have found a few other terrific sources of information.
- http://www.bestsfbooks.com
- http://www.locusmag.com
- http://www.tor.com
- https://www.worldswithoutend.com
- http://www.sf-encyclopedia.com
- http://scifilists.sffjazz.com/lists_books_rank1.html
If you have any other suggestions, please leave a comment.