Many of our books are 1st edition rare originals from personal collection of SID Williams and other high profile chiropractors. If you are not a chiropractor or if you are not gifting it to a chiropractor do not purchase. This book printed in 1920 and one of the rarest book you can find. Published by Palmer School of chiropractic and authored by BJ palmer. Would make a great gift for a chiropractor.