Gary:
I do have the "book" by C. Michael Briggs. It is photo-copied I believe, or printed from a computer. The horns, pouches, and accoutrements are great, but the production of the piece is rather simple. The photography is a little weird on a couple of pieces as well. Also, there is little to no reference as far as dimensions are concerned.
The horns are great though, and I have used several as references for building. I just wish the production was better.
If you are going to be in Lewisburg next week, I will have my copy with me. You are welcome to take a look at it.
Hope this helps.
Jeff