I re-wrote this since I learned some more. I'm sure most people know these things; I didn't.
- If your library is showing none of your books can be sent to Kindle, even though minutes earlier they could, check your internet setting. L6 turns off the option when you change your internet setting.
- Although the 'Send to Kindle' sends it to a designated Kindle (assigned a specific Kindle.com address), you can download the same sent book to any of your devices (and multiple). My recent Semeia upload is now on my iPad and my Voyage. I thought you were 'locked' into a specific device. The lock is which to automatically download to.
- Lastly, I wrote this tip this morning but I could still edit the whole thing tonight. I didn't know that. I thought you had to 'hurry'.