I saw on isbn.de a cool feature where you can click on the parts of the ISBN and it takes you to a list of other books by the publisher (or group or prefix, depending on what you click)

It would be cool if there was an advanced ISBN based search on hardcover, where publishers get a ISBN publisher prefix (or multiple) assigned to them, could probably be done automatically as well
So that you could search by group (country/language) or by publisher using part of an ISBN

Example of isbn.de: https://www.isbn.de/978-3-453-