Starfox; Signet, 1st printing July 1966

Demon of Scatterby; co author Mildred Downey Broxson, Ace, 1st printing Dec 1979, cover art by Michael Whelan, interior                              illustrations

The Guardians of Time; Baen, 1st printing Oct 1981, covewwr art by Tom Kidd

The Earthbook of Stormgate; Berley, May 1979

Virgin Planet; Paperback Library, 1st printing May 1970

The High Crusade; MacFadden Bartell, 1964