The Ruby on Rails Train has left the station ... update for "learning rails 3" planned?

Will there be a new version of the "Learning Rails 3" book by Simon St. Laurent, Edd Dumbill, Eric J. Gruber reflecting Ruby 2 and Rails 4 availability?

I am using the book as a text for CS450 (distributed application engineering). The style is set well for undergraduate study but the "Ruby on Rails" train has left the station for the next stop. Are the authors working on or considering updating the text?

Dr. Frank Mabry
Associate Professor
Distributed Application Engineering Course Director
Dept. of EE&CS
U.S. Military Academy
West Point, New York, 10996
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