There are very few reference books that have been written about insulators that you won`t come away with knowledge you didn`t have before reading said book. I`m always amazed with the research that went into some of the early books. "The Glass Insulator A Comprehensive Reference" has to be still one of the best books put together. Consider that this 1973 edition was the third revision, with 144 pages of first rate photos and fact filled information. Just read the first 25 pages and I know you`ll be a more knowledgable collector. Be the guy that can answer the questions on Icon instead of the one asking them. I`m asking $17 for this reference book and that includes the shipping. If you read it and think I ripped you off I`ll give you your money back. I have two copies, both in very good condition.