Essef - It's an ancient Aztec mask, worth a fortune in gold, but it holds more power than the human mind can comprehend. Tom Gabrieli has dredged it from the sea and vanished. Mike Gabrieli deared to wear it and his life will never be the same... Mike is confronted with an adventure beyond imagining, an adventure that will put him in constant peril of his life as he shuttles between past, present and future of an alternate reality.
Used availability for Fred Saberhagen's The Mask of the Sun
August 1991 : USA Mass Market Paperback
January 1987 : USA Paperback
September 1981 : USA Mass Market Paperback