Who did the box cover art for Keith Martin to make Night Below?
Night Below:  The set, with the product code TSR 1125, was published in 1995, and was written by Carl Sargent, with box cover art by Jeff Easley. Carl Sargent: Carl L. Sargent (born December 11, 1952, in Caerleon, Monmouthshire, Wales) is a British parapsychologist and author of several roleplaying game-based products and novels, using the pen name Keith Martin to write Fighting Fantasy gamebooks.
Jeff Easley