Ferocious Fall Author:C. a. Hartnell This 2012 edition of Ferocious Fall, ISBN 978-09855433-3-4 is no longer available from author C.A. Hartnell. A new March 2018 edition of Ferocious Fall, ISBN 978-0-9990502-3-1, with added pages, slight cover changes and updates to the editing is available for purchase.