This is it. The "Holy Grail" of glass insulator reference books. The acknowledgements that required the first two pages of Vol. 1 reads like a "Who's Who" in the hobby from Charlie Allmon and Dwayne Anthony to Ken Willick and the legendary "Shifty" Yuhas with hundreds of names in between. Vol. 1 has info. on threadless from bureau knobs to teapots, every glass plant you've ever heard of and some you haven't, electric supply companies, telephone companies, Canadian pieces, Mexican pieces, etc..Loaded with diagrams, photographs, documents, catalog ads, drawings, maps, etc.. Vol. 2 has reference to every CD known at the time of printing along with strains, knobs, commemoratives etc. with photographs of each along with variation listings of each piece. Over 500 pages of insulator brain power.-- I no longer need this two volume reference guide as I know everything there is to know about insulators. You can be a know it all just like me in no time by reading these books. Hell, even my wife calls me know it all sometimes. Why just the other day she called me Mr. Know It All ! ---- $40.00 + shipping. First email that says' "I'll take it.". No PayPal. Email with questions. Can deliver to the Blair Ranch Halloween night or the Big 'Un in the Buckeye Nov. 1,2,3.