You are bidding on a new soft cover book called M108 / M109 HOWITZER - Armor Walk Around No 21 , ISBN-10: 0897476174 by Squadron/Signal Publications . This is 11” x 9” with 88 pages from 2010 . 315 color photographs and detailed line drawings basically show every part of this weapon . Introduced in the early 1960s, the M108/M109 marked the transition from open-topped to fully enclosed self-propelled artillery. This is in excellent condition.