summary: Calibre remains to be popular among amateur librarians and digital libraries. Over time, the software was supplemented by many new features and plugins. Now, we want to revisit the digital library as an extensible space, and step back into the imagination of the library as a generative and social environment.
**Calibre** (ka la buh, NOT ka lee bra), the open-source ebook manager (<https://calibre-ebook.com>), remains to be popular among amateur librarians and digital libraries. Over time, the software was supplemented by many new features and plugins. Now, we want to revisit the digital library as an extensible space, and step back into the imagination of the library as a generative and social environment.