9780671656294 | Reissue edition (Pocket Books, March 1, 1987), cover price $2.95

9780441690510 | Reissue edition (Ace Books, January 1, 1987), cover price $2.95 | also contains The Outlaw Takes a Bride, The Outlaw Takes a Bride | About this edition: Mass market paperback

9780671655525 | Pocket Books, February 1, 1986, cover price $3.50 | About this edition: On a future Earth wracked by strife and shortages, Roy Cos buys into a lifetime of ease through the Deathwish Policy, but his privileged status makes him a target for killers hired by the elite Worldgov

9780671559427 | Pocket Books, February 1, 1985, cover price $2.95 | About this edition: When special agent Peter Kapitz is sent to Island One, America's first space colony, to investigate reports of low morale, shoddy workmanship, unexplained malfunctions, and avoidable accidents, he discovers a pervasive conspiracy involving the Soviets

9780671559410 | Pocket Books, January 1, 1985, cover price $7.95 | About this edition: Looks at technological developments which will shape the future of air and space travel, including ultralight aircraft, antimatter, and high-energy laser propulsion systems

9780671559267 | Pocket Books, December 1, 1984, cover price $2.95 | About this edition: Accidentally crossing a time barrier in the Mexican desert, archaeologist Dan Fielding finds himself pitted against the army of Hernando Cortez in a battle to prevent Cortez's conquest of North America