Warning, deep nerdistry follows.
If you cook, you likely have books. You likely have other books. And music, and movies.
For a few years now, i've been using Book Catalogue, an Android App for managing what physical books I own and where they are. It's a good app, but I've wanted something to handle other libraryish items. And I've wanted at least a web interface if not a dedicated software tool on my computer as well for additional management.