Amazon Kindle and the Kindle app is one of the best devices/apps to read books. In addition to reading books, Amazon also allows you to upload your personal books and documents to your Kindle library. This feature is missing in Google Books.
However, Amazon Kindle does not support a popular format known as ePub and this means that majority of your books may be unreadable on the Kindle. However, there are ways to actually convert ePub books to Amazon Kindle formats.
One of the easiest ways to read ePub books on your Kindle is to convert the books to a format which Kindle understands (.azw, .mobi, .PDF) and then upload the books to your Kindle library using the “Send to Kindle” app or through your personal Amazon Kindle email address (Read: How to add or send books to Kindle).
In order to convert ePub files to a Kindle recognized format, you can use an excellent software called Calibre. You can read our earlier guide on converting ePub files to Mobi and other formats to learn how you can do the conversion of your books.
Also Read: How to Open ePub books on your Desktop?
Once you have converted your book to the popular format, you can directly use Calibre to send the books to your Kindle device or app or read instructions on how to upload books to Kindle library.
Once you have uploaded your books to the Kindle library, you can then easily send it to any of your registered Kindle devices and read the books on them.