Williams, Robert Moore
Chronological Checklist
Series – Zanthar
- Zanthar of the Many Worlds (New York: Lancer Books, 1967)
- Zanthar at the Edge of Never (New York: Lancer Books, 1968)
- Zanthar at Moon's Madness (New York: Lancer Books, 1968)
- Zanthar at Trip's End (New York: Lancer Books, 1969)