| The Zap Gun was published in two issues of World of Tomorrow in 1965 and 1966 as
Project Plowshare
A plot outline was published in the PKDS Newsletter in 1988
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| World of Tomorrow November 1965 |
World of Tomorrow January 1966 |
PKDS January 1988 |
Harper 1998
Panther 1975, 76,78
Vintage 2002
Carroll & Graf 1989
Blujay 1985
Gregg Press 1979
Dell 1978
Pyramid 1967
The Zap Gun - American Editions
The Zap Gun - British Editions