I have added an update on December 31, 2015 at the end of to this earlier post.
The earlier post read...
One of the things I look forward to in 2015 is revising The Economics Anti-Textbook. We have submitted a proposal for the revision to Zed Books. If all goes well, a new edition should be ready about a year from now.
In the meantime, Tony Myatt and Brian MacLean are working on the first draft of The Macroeconomics Anti-Textbook. We're hoping that both books can be launched at the same time. Stay tuned.
Update: due to a serious spinal cord injury earlier this year, I will be unable to begin work on the new edition until the summer of 2016. I hope that the revised edition can appear in early 2017.