A novel by Jack Butler
"Nightshade (1989), is a bravura and literate sf novel combining an effective presentation of human settlements on Mars with a scientific rationale for vampires -- plus an examination of AI. Although the book shows a sophisticated knowledge of contemporary sf, hiss publishers marketed it for a non-genre audience'' (Gregory Feeley/The Encyclopedia of SF).
Used availability for Jack Butler's Nightshade
August 1989 : USA Hardback