I guess this option is not there or ? set the rating as a number for better sorting?
I do believe in user ratings and reviews, they have brought a big edge to many websites, ie. amazon, airbnb, tripadvisor, google play and others..
of course they're not everything, but its also the power of a community like here in online forums.
One could think to get the Rating as a number with digits; or even add a few other criteria : total Number of ratings/reviews (shows popularity of book), Number of 1-star ratings.
This feature is also missing in Alfa; for me it could be good as I have quite some unread books with similar content, and it helps me to choose which one to read.
Anyway Calibre is a very good software, and I thank all that took part in its dev
