Calibre 9.13 Update: Restoring Functionality to Ebook Search in Content Server

A new bug-fix release of Calibre, the open-source e-book manager and converter, has been launched with version 9.13, addressing several issues, particularly those related to PDF handling.

One notable fix resolves a conversion error that affected Linux distributions running older versions of the libxml2 library, primarily older Debian systems. The issue stemmed from a conflict between Calibre’s PDF parser and Qt’s GPU detection, both requiring different libxml2 versions. Calibre now loads the correct version it needs prior to any interference from Qt.

Additionally, users of Calibre 9.x may have noticed a regression where internal links within PDF documents would target the wrong location; this has also been remedied. Coincidentally, Papers, Ubuntu’s PDF viewer, recently addressed a similar linking issue.

Calibre 9.13 also enhances its content server feature, which lets users navigate and manage their eBook libraries through a web browser on different devices. Reports of broken searches within ePubs in the eBook viewer have been fixed, along with issues related to data file management and the disappearance of options during ebook conversions via the content server UI.

Moreover, users can once again drag and drop book covers within the Book Details panel, and the interface now displays functional Yes and No buttons when bulk editing metadata.

How to Get Calibre’s Latest Release

Calibre is available for free as open-source software on Windows, macOS, and Linux. Users can download it from the official website. For Linux, installation involves a script that downloads the binary build, which must be re-run for updates.

While Calibre is also on Flathub, it is important to note that it currently features an unverified build that is two versions behind the latest release.