Peter Ruff And The Double Four is a book written by E. Phillips Oppenheim. A set of short stories about the gentleman criminal and master of disguise ''Peter Ruff''. The main character, Peter Ruff, goes to great lengths to discredit a police investigator who got in his way and abducted his lady. Following a career in crime, Peter Ruff decides to use his insider knowledge to work as a private investigator. Along with action, fancy English conversation, and romance, the hilarious plot also features some humor. The 1912 book "Peter Ruff and the Double Four" by E. Phillips Oppenheim details the ascent of country squire Peter Ruff into the criminal underworld. After being chosen as the organization's replacement for the enigmatic "Double Four" organization, Peter is compelled to fully commit to his new job. With spies, global espionage, and intrigue, Oppenheim has written a fascinating book.