The Mystery of Dr. Fu-Manchu

True first is the UK edition: Methuen & Co., London, June 1913, under the title 'The Mystery of Dr. Fu-Manchu', collecting stories serialised from October 1912 to June 1913. Both editions are collected. The first American edition is McBride, Nast & Company, New York, 1913, retitled 'The Insidious Dr. Fu-Manchu' and published several months later (recorded variously as September and October 1913) — so the retitling, not a date statement, is the fastest way to tell the two apart. Some secondary accounts name Cassell as the first book publisher; that appears to be a conflation with the Cassell magazine in which the stories were serialised, and no dealer or catalogue record supports a Cassell first edition.