# Preparing an e-book for Kindle

The Kindle is a revolutionary device that changes the reading habit of a lot of people, including me recently. Everything works flawlessly when you purchase a book from the Amazon store.

Not every book exists in the store, and sometimes you find the same book in a different vendor at a much cheaper price. The problem starts here. All the beauties of having a Kindle disappear in this situation.

In this post, I will help you prepare your books for Kindle. You can find step-by-step instructions for the most popular formats.

## Instructions for `KFX` format

1.  Install [Kindle Previewer 3](https://www.amazon.com/Kindle-Previewer).
    
2.  Install [KFX Output by jhowell](https://www.mobileread.com/forums/showthread.php?t=272407) extension.
    
3.  Add the book to `Calibre` using the `Add books` button.  
    **Note:** Right now, the plugin only works for **EPUB to KFX**.
    
4.  Click `Convert book` and convert it to KFX by selecting `Output format: KFX`.
    
5.  Be sure you don’t have any `mobi-asin` tags. You are allowed to have tags of `isbn`, `amazon`, `google`, and `goodreads`.  
    **Note:** Use the kindle version if you want to update your reading status at g[oodreads.com](https://www.goodreads.com/) from Kindle UI.
    
6.  Eject the devices from File Manager and enjoy the full integration with g[oodreads.com](https://www.goodreads.com/) as if you have purchased through the Kindle store.
    

## Instructions for `AZW3` format

1.  Get the book in any format you want. If you have a chance to get in`.mobi` format, prefer it. Because Amazon’s e-book format, AZW, is based on`Mobipocket`format.
    
2.  Add the book to `Calibre` using the `Add books` button.
    
3.  Click `Convert book` and convert it to AZW3 by selecting `Output format: AZW3`. Be sure to select `AZW3`, not `AZW`.
    
4.  Click `Edit metadata` and remove all formats but `AZW3`.
    
5.  Click `Download metadata` on the same window and download the necessary metadata.
    
6.  Be sure you don't have any `mobi-asin` tags. You are allowed to have tags of `isbn`, `amazon`, `google`, and `goodreads`.  
    **Note:** Use the kindle version if you want to update your reading status at g[oodreads.com](https://www.goodreads.com/) from Kindle UI.
    
7.  Install `Quality Check` plugin inside the `Calibre` application
    
8.  Hit `Quality Check > Fix > Fix ASIN for Kindle Fire`.  
    Don’t worry, this will work for `PaperWhite` as well.
    
9.  Eject the devices from File Manager and enjoy the full integration with g[oodreads.com](https://www.goodreads.com/) as if you have purchased through the Kindle store.
    

### References

1.  [https://en.wikipedia.org/wiki/Kindle\_File\_Format](https://en.wikipedia.org/wiki/Kindle_File_Format)
    
2.  [https://goodereader.com/blog/e-book-news/amazon-has-developed-a-new-e-book-format-called-kfx](https://goodereader.com/blog/e-book-news/amazon-has-developed-a-new-e-book-format-called-kfx)
    
3.  [https://epubor.com/difference-between-kindle-content-azw-azw3-prc-mobi-topaz.html](https://epubor.com/difference-between-kindle-content-azw-azw3-prc-mobi-topaz.html)