Version 1.2 is the latest version of the book that is available for sale from all the major retailers. Paperback copy is available through Ingram distributors. All the following book listing links point to external sites.
Amazon.com ,
Barnes&Noble (USA)
Apple iBookstore (Version 1.2): All available markets
Amazon Kindle (Version 1.2): Amazon.com
Last modified: January 17, 2015.