No, there is no reference on the GenWeb / RootsWeb site to "The Jack County Genealogical Society". I've been looking off and on for a goodly amount of time for the above reference book. In addition, I have not been able to kind any current references to this organization. I did have a person at a library that was kind enough to send me the relevant pages on my (same) Dean family.
There is an address on the site for: North Texas Genealogical Association P.O. Box 4602 Wichita Falls, TX 76308
However, I have no knowledge as to whether they are the transmutation of an earlier Jack County Genealogical Society, or whether this was/is a parallel group.
I am interested in purchasing a copy of this book, so please email if anyone has one for sale.Thank you. Scotty Dean