ΒΆ How to Import
Devourer is able to import an existing Calibre library. When importing a library from Calibre, the following data will be copied over.
1. Existing metadata.
2. Multiple book formats, if present.
3. User tags.
4. Ratings.
To import a library, it's pretty straightforward. When on the remote libraries screen, click the + icon to bring up the Create remote library modal, set the type to book, enter a path to your existing library and click Import from Calibre (not Create Library).
Give it a minute to begin the import, then click the refresh icon at the top right of the page to see your import progress.