This translation originally published: London : Deutsch, 1969. - Translation of: 'Agaton Sax och de okontanta miljardärerna'. Stockholm : Bonnier, 1967.
Agaton Sax and the Scotland Yard mystery by Nils Olof Franzén. ISBN 0426102096. Published by Target Books in 1973. Publication and catalogue information, links to buy online and reader comments.