How do I add an ebook to my Kindle App on Android?
Download to the .mobi version of your ebook to your computer (remember where you put it). Plug your Android device via USB into your computer. On your Android device set it to ‘USB storage’ this may be a pop up query, but you may have to activate it from you device settings. Navigate from your computer to the /kindle folder and copy the .mobi file here. Eject or dismount your phone safely from the computer before disconnecting the cable. And don’t forget to uncheck the ‘USB storage’ button on your Android device (Thanks to Smashwords customer Darold Dickey for contributing this FAQ).