[Voicedude]

I have several books in my Calibre library that are different editions of the same book featuring different forwards or additional features or notes and I would like to have both copies on my device. Whenever I try to send the second version to the device, it removes the first version from the device. I've tried every way possible (that I can see) to add the "id" field to the "Send to Device" template but it still replaces the existing book on the device.

Any suggestions appreciated.