grrrramazon infomercial (can’t get a decent description of the book on this site!): ‘The Curious Quest’ was also known as ‘The Amazing Quest of Mr. Ernest Bliss’.
Oppenheim featured on the cover of Time magazine on September 12, 1927, he was the self-styled “prince of storytellers.” He composed some one hundred and fifty novels, mainly of the suspense and international intrigue nature, but including romances, comedies, and parables of everyday life. He was the earliest writer of spy fiction as understood today, and invented the “Rogue Male” school of adventure thrillers that was later exploited by John Buchan and Geoffrey Household.
Imdb summary: A bored millionaire wagers his doctor that he can support himself at a working class job for year without touching his inheritance.