Readarr

Readarr is an ebook and audiobook collection manager that automates acquisition and organization of books for Usenet and BitTorrent users. It monitors authors and RSS feeds, searches indexers, and imports releases into a structured library with consistent naming.

Key Features

• Monitors authors and lists to automatically detect and grab new releases
• Integrates with Usenet and BitTorrent download clients for automated fetching
• Quality profiles and automatic upgrades (for example, replacing lower-quality formats)
• Library import, sorting, and configurable renaming
• Handles failed downloads by retrying alternative releases
• Manual search and release selection for troubleshooting and fine control
• Calibre integration for adding to library and optional conversion (requires Calibre Content Server)
• Web-based UI and multi-platform support (Linux, Windows, macOS, and others)

Use Cases

• Automate building and maintaining an ebook library from preferred authors
• Manage an audiobook collection with consistent naming and folder structure
• Keep a library complete by scanning existing folders and fetching missing titles

Limitations and Considerations

• The project has been officially retired by its maintainers, which may impact long-term maintenance and metadata reliability
• Only one type per book is supported per instance; managing both ebook and audiobook versions typically requires separate instances

Readarr fits well in a Servarr-style media automation stack where you want hands-off discovery, downloading, and library organization for books. It is best suited for users comfortable with indexers and download client workflows and who can account for its retired project status.