The feature:
I would like to see a score from 0 to 1, 1 to 100, or something like that that reflects how likely I am to enjoy a book. This can be displayed on the webpage for that book as well as in the recommendations page.

The use case:

• Many times I will browse the website for books or be recommended by a friend to read a specific book. I would like to know how much the book aligns with my interests, or if it would have shown up on my recommendations list.
• I would also like to know, as I scroll down the recommendations list, the recommendation score for each book so I have a better understanding of the results.