• hb, Doubleday Book Club Edition, 1x good
  • pb, Pan Science Fiction, 1x fair
  • pb, VGSF, 1x good
  • pb, Dell SF, 1x good
  • pb, Baen, 1x good

Wanted:

  • Gollancz HB, 1977, ISBN 02249-3
  • Urania PB, 1981, Italian as I Figli Di Medusa