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Carl Sargent
Carl Lynwood Sargent was a British parapsychologist and author of several roleplaying game-based products and novels, who used the pen name Keith Martin to write Fighting Fantasy gamebooks.
Excerpt from Wikipedia, available under CC BY-SA 4.0.
Books

Cybertechnologie
1998
ISBN 9783890647227
The Restless Dead
1989
ISBN 9781869893736