This new 27th Edition simply contains more firearms values and information than any other single publication. Included is a revised Photo Percentage Grading System? ? these 64 pages feature high resolution color images and are the last word to help ascertain any firearm's correct condition factor, based on percentage of original condition. This is the book that the firearms industry refers to as ?the bible, ? and it's easy to see why. Expanded to 2,008 pages, featuring over 300,000 firearms prices, the new Blue Book of Gun Values? also contains almost one million words of text ? no other book is even close! Most of the information contained in this publication is simply not available anywhere else, for any price!Blue Book of Gun Values, 27 with ISBN 9781886768628 and ISBN 1886768625.