To begin with, the book is available as a Kindle eBook through Amazon.com. It looks great on the Kindle Fire tablets, but you can read it on a variety of platforms by using the free Kindle app (available for PC, iPhone, etc.)
Here's where you can buy it on Amazon.com:
It's available on all the different Amazon sites worldwide. Save $$ by avoiding shipping costs!
We may sell it as an ePub directly from our website if we get enough demand for that format. Contact us if you would like to buy the book as an ePub.