There are several Delta Clubs.
TGT is one of the best sources of Illegal ID's.
Jeff Laudermans KY book is good.
I have a KY book written by Larry Trapp (THE Ky expert) and another Ky chipper. Only about 8 books were made. The best! I pretty much know KY chips and the history, so seldom use a book.
There are a couple of Galveston books. Ed Hertzel has one for $19. Haven't seen it yet, but sent for it. Frank Chalfant has a good one.

Ed Hertzel's web site is a very good information source for illegals.