Our eBooks are simple PDF files you read on any computer while the Kindle uses a file format exclusive to Kindle readers.
However, there is a way to read your eBook PDF on your Kindle and this article tells how to do it:
http://www.howtogeek.com/howto/32987/how-to-read-pdf-files-on-your-amazon-kindle-version-3/
Just remember that it might not look perfect on the Kindle compared to a PC, but it should be readable.