If you’re using an apple device, just click the download link above, then select “open in Kindle” or “open in iBooks”.
*** For iPad and iPhone, you might have to tap the download link twice. ***
If you’re using a different device, you may need to use a computer to download the file, then transfer to your reading app.
More instructions on how to do this can be found here:
For Devices using the Kindle app: http://www.amazon.com/gp/sendtokindle
For the Nook app: http://www.barkingrainpress.org/faqs/load-epub-nook/