"My iBook will be sent to the iBook publisher on Feb 6th 2013."
Yes! I have been waiting for this quite some time now, looking forward to the release. Have a look at the sample pages on Brian's website.
April 23rd, 2013 — Update: The book has been released, read more here.
February 19th, 2013 — Update: Brian Tindall and Richard Hurrey are discussing the upcoming book on the Luxology Forums.