These comments at Amazon, while looking for prices (I use their links for used from small booksellers, wherever I can).
More than a FORTH text, March 28, 2003
\tReviewer: A reader from Longmont, CO United States
Thinking FORTH is as much about philosophy of problem solving and programming style as FORTH. Concepts presented in this '84 publication were light years ahead of their time. OOPs concepts, including data encapsulation, modularity and overloading are explained in simple understandable terms (although with different terminology). Emphisis is on eligance, flexibility and reusability, written in Leo Brodie's unique style. (NO YOU CAN'T HAVE MINE!) --This text refers to an out of print or unavailable edition of this title.
I'll keep eye peeled for a dog-eared version; price reflects the Worth apparently now assigned to both of these (how odd when Econ theory occasionally works..;-) besides, I Love er prescience.. "'light-years ahead' in '84"


Ashton