Readarr docker container to obtain new books via Usenet (primarily ALTHub)
SABNzbd docker container to download
Readarr searches Usenet for books, then sends what it finds to SABNzbd, which downloads the file to a folder that Calibre watches, which then imports the book and adds it to its database, which Calibre-Web has access to, so in a minute or two it’s available in Calibre-Web for download/reading/conversion.
If for some reason the book isn’t available via Readarr/Usenet, it can be downloaded via other methods and uploaded to Calibre-Web, so everything ends up in the same place.-___