If you make comics, Kindle Comic Creator is Amazon's free tool to covert your art into Kindle books. The program does all the grunt work for you, like importing art, helping create the reading format, and giving you a preview of how your comic will look on Kindle.
Designed to be simple, Kindle Comic Creator accepts common file types to create amazing Kindle-formatted comic books.
If you're planning on releasing a comic book on Kindle, you need to use Kindle Comic Creator.
Kindle Comic Creator supports the following formats
PDF, JPG, TIFF, PNG and PPM