Black Knight of the Iron Sphere(1979)
(The third book in the Lord Tedric series)
A novel by Gordon Eklund and E E 'Doc' Smith
Ace mass market paperback, 1981. This is the third of four novels Eklund wrote in the "Tedric" series, based on a character conceived by Smith. The other novels are "Lord Tedric" (1978); "Space Pirates" (1979); and "Alien Realms" (1980).
Used availability for Gordon Eklund's Black Knight of the Iron Sphere
June 1981 : USA Mass Market Paperback
October 1979 : UK Mass Market Paperback
September 1979 : USA Paperback