Ace Books, 1981. Mass market paperback. Collects 14 stories, with introduction and afterwords by the author. Stories “The Man Who Stole the Moon” (1980) “The Deimos Plague” (1978) “Forefather Figure” (1981) “Moment of Inertia (McAndrew series)” (1980) “The New The Speed of Lightness, Curved Space, and Other Heresies” (1980) “From Natural Causes” (1978) “Legacy” (1977) “The Softest Hammer” (1982 Locus Poll Award) (1981) “Best Short Story ( 19))” (x) “Hidden Variable” (1980) “A Certain Place in History” (1977) “All the Colors of the Vacuum” (1981) “Perfectly Safe, Nothing To Worry About” (1977) “Summertide” (1981) “The Marriage of True Minds (1981)