Cover image not available
Originally published: New York : Harper and Row, 1978 ; London : Cassell, 1979.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
The adventure of the stalwart companions by H. Paul Jeffers. ISBN 0417047401. Published by Magnum in 1981. Publication and catalogue information, links to buy online and reader comments.