Using a bit of free software, you can take ebooks in the EPUB, Mobi, and PDF formats and zap them over to your Kindle lickety-split.
You'll see a pop-up menu with an email address Any document supported by Kindle that you send to this email will appear on it. Select your Kindle and click the button below Actions next to it. Visit the Manage Your Content and Devices and click the Your Devices tab.