For Kindle through Amazon.com for $2.99.
In paperback through Amazon.com for $11.49.
I will soon have the print version available directly through the webpage. This version will have the same retail as the Amazon.com version, however it will come personalized with a signature and ship free (within the continuous 48 states). I expect this option to be available by March 25th, 2015, but check back often for details. This is no longer an option.