P1.0 (Printing) - 24 August 2011

First Printing

B2.0 - 08 June 2011

Final, pre-production beta
Fixed numerous errata
Added Section 2.3, Is it concurrency or parallelism?
Added Section 4.4, Java 7 Fork-Join API
Added Section 8.12, Remote Actors
Various other updates based on feedback from technical reviewers

B1.0 - 20 March 2011

First Beta