Jerry Blanchard -- National slingshot champion
in 1979, 1980,  1984, 1996, 2000 and 2005.
"Jack has more information in his book than I ever dreamed
existed. I think his book could help any shooter get better."

Richard (Blue) Skeen -- National slingshot champion
in 1981, 1983, 1985, 2001, and 2002.
"I would recommend Jack's book to any beginner and also to any
experienced shooter that wants to become better."

William Herriman -- National slingshot
champion in 2003 and 2004.
"The book is an excellent addition to the slingshot sport. I am
proud to own a copy.

Melchior Menzel -- Europe's slingshot aficionado.
Email -- "Today, the book has arrived, and to say the least, I am
highly impressed! You've made an awesome collection of slingshot
knowledge. I also like the style the book is written, very informative
and easy to understand. This is definitely the best text about
slingshots I've read so far, and believe this book should become the
standard for every serious shooter. I hope this book will become a
success, it will help promote the slingshot sport more than anything

Vlastimil Zuska review.      
"Koehler wrote an excellent introduction to slingshot design,
shooting (both tournament and hunting). I believe he is a shooter
who penetrated really deep into the mystery of slingshot shooting - I
was convinced by his chapter about aiming (besides others)- he
writes about possibility of negative dominancy of rhytm over
conscious aiming. I have come to this insight only after couple of
years. I fully recommend this simply written book with many
profound insights."