Originally published, Greenwich (Conn.): Fawcett, 1965; (B67-8755), London: Hale 1967.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
A deadly shade of gold by John D. MacDonald. ISBN 0330024477. Published by Pan Books in 1970. Publication and catalogue information, links to buy online and reader comments.
