Berkley #X2002, 1971. Vintage Paperback Original in near fine condition. Small bump at the lower right corner of the front wrapper. First book publication of this pulp novel.
Dr. Krueger uses Zeppelins in clouds to carry small planes with dummies attached to bombs to blow up Allied munitions dumps & G-8 makes an uneasy alliance with him! Also has R-1, a female Allied secret agent. The story read here was Patrol of the Murder Masters, G-8 #41.