You can check whether a book has been sent to your device from your Manage Your Content and Devices page in the Content Tab, select show Docs (Edelweiss books will send to your Documents folder on Kindle, rather than Books).
You can check whether a book has been sent to your device from your Manage Your Content and Devices page in the Content Tab, select show Docs (Edelweiss books will send to your Documents folder on Kindle, rather than Books).