 The collected stories were intended for book publication by Lancer Books, but this edition never appeared due to Lancer's bankruptcy, and the first book edition was issued in paperback by Ace Books in paperback in May 1977.It was reprinted by Ace in July 1981, April 1982, November 1982, August 1983, July 1984, 1986, June 1991, and April 1994.The first British edition was published by Sphere Books in October 1978, and reprinted in July 1988.