Zahn, Timothy,
--The Art of War, #549, March, 1997. (novella)

Zebrowski, George,
--Heathen God, January, 1971.
--The Word Sweep, #339, August, 1979.
--Godel's Doom, #418, March, 1986.

Zelazny, Roger, (1937-1995)
--A Rose for Ecclesiastes, November, 1963. ** (novelet) SFHF
--This Moment of the Storm, June, 1966. * (novelet)
--The Three Descents of Jeremy Baker, July, 1995.
--also see Ellison, Harlan, and Roger Zelazny