Lynn BeachOperation: Time Machine (G.I. Joe, Find Your Fate, No. 15) Ballantine Books February 1987 0345340639 / 9780345340634 Mass Market Paperback Used - Very Good used paperback edition. lightly shelfworn, corners a bit bumped, some creasing/scuffing/wear to covers. binding is straight and tight. no marks to the text or other serious flaws.