What it sadly is missing is the data. My first try, I found 2 out of 3 books in a series missing, and the first book was missing data. It looks like ImportBot [0] adds them somehow, but it’s not clear how this is done and how it could be fixed as there’s no information on the user page. As much as I’d like an open solution, if I have to add every other book I read to the database first, that will make me stop using it quickly.
[0]: https://openlibrary.org/people/ImportBot