Star Books, British paperback original novel. This is the fourth of four novels Eklund wrote in the "Tedric" series, based on a character conceived by Smith (though Eklund is not acknowledged in this book). The other novels in the series are "Lord Tedric" (1978); "Space Pirates" (1979); and "Black Knight of the Iron Sphere" (1979).
Edward Elmer Smith (also E.E. Smith, E.E. Smith, Ph.D., E.E. “Doc” Smith, Doc Smith, “Skylark” Smith, or—to his family—Ted), was an American food engineer (specializing in doughnut and pastry mixes) and an early science fiction author, best known for the Lensman and Skylark series. He is sometimes called the father of space opera.
Having read the Lensmen series its easy to see the similarities between the two. Not really Doc Smiths best work but then I understand that much of the Tedric series was written by someone else which might explain it.