Originally Posted by GRiker
The plugin does require iTunes. With a connected iDevice, books are sent through iTunes to iBooks without keeping a copy in iTunes.
The driver communicates with iTunes using app automation to transfer books and metadata.
If you're asking about how the plugin is implemented, the code is in calibre/devices/apple/driver.py.
Hmmm....that only works with sync itunes with device after calibre send to itunes. AND whatever i do, calibre send the file to the itunes database