Ace
1964  Almuric
1970  Almuric
1979  The Gods of Bal-Sagoth
  The Howard Collector
  Tigers of the Sea
  Worms of the Earth
  Pigeons from Hell
  The Sowers of Thunder
  Three-bladed Doom
1983  The Iron Man/The Incredible Adventures of  Dennis Dorgan
  Heroes of Bear Creek
  The She Devil
1984  Cormac Mac Art: Tigers of the Sea
1986  The Sword Woman
  The Lost Valley of Iskander
1987  Son of the White Wolf 
  Black Vulmea's Vengeance
  Swords of Shahrazar