New York, New York: Ace Books, Inc., 1965. Ed Valigursky (cover); John Schoenherr (cover). 1st Edition. Soft cover. Very good paperback copy of "Our Man In Space" by Bruce W. Ronald & "Ultimatum in 2050 A.D." by Jack Sharkey. Ace Double M-117 originally priced at 45 cents. Slight edge wear..... More