I am an mechanical engineer in Germany, now retired. Since 1980 I am interested in the background of the technology to fight against myths and tales in archery equipment especially recurve. I am very happy about this very, very good book.
In 1985 I developted a mathematical Model to compute the tuning of bow and arrow and I am glad to see that the most of this simple Model:
http://rz-home.de/~cnentwig/Innenballistik_Bogen.html
are now quite good verified by the excellent work of Dr. James L Park.
I am proud to get an exemplar with a personal dedication of Dr. L Park.
Chr. Nentwig