I'm not sure if this is exactly what you're looking for, but https://hn.algolia.com/ is pretty much the default (unofficial) search and personalized sorting site for HN. Super fast and works well in my experience.
From my understanding and my own desires, I think the previous comment is looking for a site that will offer a list of book links on HN with parameters to filter/sort the books. That way you can find "most mentioned books in the last year" or "highest karma book links for the last month".
