I had to dig my copy of Kummerfeldt's book out to familiarize myself with it.
It is an excellent book, with a forward by Jim Zumbo. (an editor for Outdoor life magazine years ago, but famous for the firestorm with the '94 Assault Weapons Ban and his comments that "no one needed black rifles.
Overall, the book is well written and informative if not a bit on the dry side. I will say it has an extensive 6 page bibliography that contains many interesting entries.
Still, I checked the price on Amazon, where prices start at $21.21 and up for used copies. Kummerfeldt sells copies on his site for $19.95. Either way, it is well worth the investment!
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WesleyH