Link to Kindle book: http://www.amazon.com/dp/B00VSB8TH6
The second link, Ganxy, has more types of files and costs less.
On Ganxy, the "buy direct" button, there is a .pdf file for purchase and an .epub file, along with a .mobi for tablets.
The paypal button below is where, after payment, you will be redirected to a page that has three different file versions, .mobi; .pdf; epub; on it, but costs a little less, like $2.05. The only drawback is that you may need to copy and past the web page address into your browser's address bar.