P1.0 (Printing) - 12 August 2014

First printing.

B4.0 - 28 July 2014

Production is complete, so this is the final beta. Now it’s on to layout and the printer.

B3.0 - 19 June 2014

This is the last Beta before going to production. It contains many tweaks and fixes, plus the last remaining chapter: Chapter 12, The Evolution of Attribute Methods.

B2.0 - 03 April 2014

We have a brand new chapter for you: Chapter 11, The Rise and Fall of alias_method_chain, on page 189.

B1.0 - 10 March 2014

Initial beta release.