A best-selling author of novels, short stories, magazine articles, translations, and plays, Oppenheim published over 150 books. He is considered one of the originators of the thriller genre, his novels also range from spy thrillers to romance, but all have an undertone of intrigue. 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. This 1927 old detective story by Oppenheim revisits the plot device of a young man who comes into a large fortune suddenly and explores the class differences between the lower middle, and the upper class.