How do I transfer books to Kindle app on iPad?

I can see them in iBooks, but how do I get them to show up on my Kindle app on my iPad?

I tried to import the file into my iTunes music library and it seems like it is doing something, but I can't find the book when I search and yet I can see the folder on my computer in the music folder. I've gotten used to the Kindle interface and I don't care for the iBooks.

Is there a way to do this?

Thanks for you help.
Cyndi