30 July 2014 P5.0 (Printing)

Internal updates for improved e-reader compatibility and consistency across platforms.

25 June 2013 P4.0 (Printing)

Fourth printing, updated to Ruby 2.0.

14 October 2011 P3.0 (Printing)

Third Printing.

This release fixes several errata. For complete details, please see errata.

05 May 2010 P2.0 (Printing)

  • Second Printing, minor errata fixes

30 March 2009 P1.1

Due to a production error in the P1.0 version, some code output contained error messages instead of the actual code output. This problem has been corrected in this version.

25 March 2009 P1.0 (Printing)

First printing

21 January 2009 B1.0