How do I add another kindle device to download to from my account

You need to log in the same kindle account and the purchased books will be synced automatically. If this doesn't work, you can convert the kindle books to epub file and transfer to ipad. You need to connect your Kindle device to computer and then convert the books in Kindle. After that, you can transfer the books to ipad with iTunes or iTransfer. For more details, check: A Simple Guide to Help You Read Kindle Books on iPad

Check the Serial Number You can find this sixteen digit code in the box your Kindle came in or when you click on Settings and go to Device Info. Find your specific generation or type based on the first four characters. Kindle 2: B002, B003 Kindle DX: B004, B005, B009 Kindle 4: B00E, B023, 9023 Kindle 5: B012 Kindle Keyboard: B006, B008, B00A Kindle Paperwhite (2012): B024, B01B, B01C, B01D, B01F Kindle Paperwhite (2013): B0D4 or 90D4 Kindle Touch: B00F, B010, B011 Kindle Fire (2011): D01E Kindle Fire (2012): D026 Kindle Fire HD 7(2012): D025 and D059 Kindle Fire HD 7(2013): 00D3 and 00D2 Kindle Fire HD 8.9: B0C9, B0CA, B0CB, and B0CC Kindle Fire HDX 7: D0FB, 00FB, 00FC, 0072, 00FD, 00FE, 0073, 006C, 006D, 006E Kindle Fire HDX 8.9: 0018, 0057, 005E, 00F3, 0019, 0058, 007D, 007E, 007F - See more at: http://glyde.com/glydecast/how-to/which-kindle-do-you-have/#sthash.bAbYPdzQ.dpuf

Amazon is cautioning clients of more seasoned Kindle tablets that they In the event that the issue continues, if you don't mind restart your Kindle from the Menu in Settings and attempt once more. Arouse fifth Generation. Encourage Touch fourth Generation. Encourage Paperwhite fifth Generation. First gander at Amazon's Fire tablets For more help related kindle devices contact our kindle customer services number +1-844-769-9823.

login in www.amazon.com and then in the right collapsible menu go to my devices and add your serial number and your kindle will be added in the account so you can restore all your previous epub. There is also the chance that you have used calibre and so you will have all your backed up copis in your documents in the pc.

Sounds like your wife's kindle is registered in your name. You can find out by logging into your account on amazon. Up the top open your account window then scroll down and click on " Manage Your Devices". If your wife's kindle in on your account then you have to unregistered it from your account then see would register it in her name. She can do this while on her kindle table.

Look at the box back

Sign into your Amazon account and go under manage your device and the serial is there.

In your Amazon account, ( If you don't have one, create one) simply login and click on the "Manage your Kindle" tab on the right of the screen, and then select the "my devices" option, where you can register or deregister your Kindle.
If your Kindle is second-hand, you'll need the serial number of your Kindle to register it in your name.

When you register your Kindle, you'll be able to purchase and download content easily. You can register or deregister your Kindle on your computer through the Manage Your Kindle page, or right from your device.
Note: If you have a Wi-Fi only device, you will need to set up your Wi-Fi connection in order to register from your device.

To register or deregister your Kindle from your device:

1. Move the 5-way controller down until "Settings" is underlined and press to select.
2. Press the 5-way controller to select "register" or "deregister" from the Settings screen. If you don't have an Amazon.com account, you will be prompted to create one.
3. When you register your Kindle, enter your Amazon.com user name and password (the e-mail address and password associated with your Amazon account) using the keyboard.
4. Move the 5-way controller to select "OK."

Tip: If your Amazon user name or password contains characters or numbers not present on the Kindle keyboard, press the Symbol key to see a menu of additional characters.
Registering if You Don't Have an Amazon.com Account If you don't already have an Amazon.com account, you can create one at www.amazon.com. Here's how:

1. On the sign-in screen, enter the e-mail address you want to use for your Amazon.com account. This e-mail address will be the one we use to send you updates about your orders.
2. Don't enter a password. Check the button next to "No, I am a new customer" and then click the Sign in using our secure server button to continue.
3. Enter your name and verify your e-mail address on the Registration screen.
4. Enter a password for your new account and click the Continue button. We'll ask you to enter the same password twice to make sure it is correct. (You might also want to write your login informaiton so you'll have it later.)
5. Visit the Manage Your Kindle page. Enter the serial number for your Kindle and click the Register a new Kindle button. You'll find Kindle's serial number on the outside of the box or on the Settings menu on your Kindle.

If you're unable to locate Kindle's serial number, don't worry. You've successfully created an Amazon.com account and can now register your Kindle wirelessly following the Registering Your Kindle instructions above.