That depends on what you want to do. If you could have the same book on multiple devices that you are tracking using the plugin, then either use a unique Tag value for each list, or make sure your custom column is of type "Comma separated text" and use a unique text value.
Then using the plugin create a reading list for each device setting it to assign the relevant unique value and setting other options that you prefer like automatically syncing when the device is connected. Plug each device in turn, associating the list with that device and that should be job done...
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