A must book for your insulator library. This is the 1969 revised edition. About 130 pages and containing info that was pretty impressive for its time. Cranfill and Karedfelas were at the front of most of the early publications. There is a price guide that is included with the book. The book is in very good used condition. The guide shows more wear but is still in pretty good shape. $10 will get it delivered to you anywhere in the US (media mail)