On a EPad how do I view books on the Kindle app? HELP ASAP?

On my Epad I downloaded the Kindle app, I also have loads of books for this app on my computer (mobi format) I want to view these books of the kindle app but im not sure how! The app has some books already on it eg Pride and Prejudice which i can read on it! but im not sure how to get my other books onto the app! PLEASE HELP asap!