THIS IS SPECIFIC TO iPhone/APPLE DEVICE USERS WHO RUN THE KINDLE APP.
There is another option where you can simply e-mail a copy of the book file to your kindle specific email address (if you know how to do this - we will add another blog to explain how to send gifted/Arc/Beta copies of e-books. Those same directions will apply to sending a file to yourself, if it seems easier than the below option).
Download the purchased file directly to your device! You can do this with the download button immediately after purchase or via the e-mail with a download that will be sent to you after purchase.
Find your file on your device! This step tells you to click on the search in app option. EASIER STEP TWO:
You can also simply hold on the file name and then click the "Share" option that pops up and choose to share to your Kindle App. If you use the latter option (not pictured), then skip straight to step FIVE! ;)
As the image says, just click once!
Use the "upload" or "share" button at the top righthand side of your screen and choose the Kindle app as the place you want to share the file with. (If you already completed this step then move on to the next).
You can change the file name to match that of the book title. While the image below states that you can add an author name if you wish, I believe the app makes you enter an author name before you can continue.
Make sure your "save in Kindle Library" is toggled on (white dot to the right).
Then click send.
Open your Kindle App on your iPhone (or Apple Device). Open your library and make sure you have "All" toggled at the top, not "Downloaded".
Your book will initially appear as a generic DOC image.
Click on that image to download your book file to the Kindle App.
Now that you've downloaded your book to the app, you will see the book cover instead of the generic DOC image shown previously. You may click to read the book now!
If you ever "lose" a book file that you know was manually uploaded, sent as a gift, etc. and not a book purchased directly from Amazon, you can use the filter option in your library to check out DOCS. Docs are books that were emailed direct to your kindle as a gift, ARC, or BETA edition, or book files that you uploaded yourself.
If a book is not currently downloaded to your app on that device, it will show as a generic DOC image. If you have the book downloaded and readable, it will show as the book cover.