ELANA SERIES
Enchantress From The Stars .............................. 1970
The Far Side of Evil .................................... 1971
CHILDREN OF THE STAR SERIES
Heritage of the Star aka This Star Shall Abide ......... 1972
Beyond the Tomorrow Mountains .......................... 1973
The Doors of the Universe .............................. 1981
Children of the Star (omnibus) ......................... 1999
NON-FICTION
The Planet-Girded Suns: Man's View of Other Solar Systems ............... 1974
The Subnuclear Zoo: New Discoveries in High Energy Physics (with Rick Roberson) ...... 1977
Tool For Tomorrow: New Knowledge About Genes (with Rick Roberson) ............. 1979
Our World Is Earth ...................................... 1979
ANTHOLOGIES EDITED
Universe Ahead: Stories of the Future (with Rick Roberson) ............... 1975
Anywhere, Anywhen: Stories of Tomorrow ................................... 1976
Extraterrestrial Life ................................... 2005