A version of simkl for books
Either a new branch of the website or added in with the tv shows, anime, and movies
I think it'll be hard to top Goodreads' popularity
Kevin McDonagh commented
Meanwhile, check goodreads.com
Ben Samyn commented
Idea to start an implementing of this feature could be adding the books upon which a movie was based and compare these to each other (by user score etc).
Although, realistically speaking, they're probably wanna maintain/update their core business for now.