I have the white book I got from a Soares Seminar. Before that I haden't seen them. It is nice to read the actual listing uses for materials. A good example is the use of OTHER THAN direct bearing set screw connectors on aluminum AC cable. I don't see this in the code, but it is in the white book. The cheepo connectors supply houses ship are not listed for Alum AC but they don't know that and most wireman don't know of the white book.
