Fanthorpe, R L
Chronological Checklist
Series – as Karl Zeigfreid
- Gods of Darkness (London: John Spencer and Co/Badger Books, 1962) as by Karl Zeigfreid
- Walk through Tomorrow (London: John Spencer and Co/Badger Books, 1962) as by Karl Zeigfreid
- Android (London: John Spencer and Co/Badger Books, 1962) as by Karl Zeigfreid
- Atomic Nemesis (London: John Spencer and Co/Badger Books, 1962) as by Karl Zeigfreid
- Zero Minus X (London: John Spencer and Co/Badger Books, 1962) as by Karl Zeigfreid
- Escape to Infinity (London: John Spencer and Co/Badger Books, 1963) as by Karl Zeigfreid
- Radar Alert (London: John Spencer and Co/Badger Books, 1963) as by Karl Zeigfreid
- World of Tomorrow (London: John Spencer and Co/Badger Books, 1963) as by Karl Zeigfreid
- The World that Never Was (London: John Spencer and Co/Badger Books, 1963) as by Karl Zeigfreid
- World of the Future (New York: Arcadia House, 1964) as by Karl Zeigfreid
- Projection Infinity (London: John Spencer and Co/Badger Books, 1964) as by Karl Zeigfreid
- No Way Back (London: John Spencer and Co/Badger Books, 1964) as by Karl Zeigfreid
- Barrier 346 (London: John Spencer and Co/Badger Books, 1965) as by Karl Zeigfreid
- The Girl from Tomorrow (London: John Spencer and Co/Badger Books, 1965) as by Karl Zeigfreid