Originally published, Garden City [N.Y.]: Doubleday, 1969; London: Faber, 1970.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Creatures of light and darkness by Roger Zelazny. ISBN 0099067501. Published by Arrow Books in 1972. Publication and catalogue information, links to buy online and reader comments.
