The Great Impersonation is a mystery novel by E. Phillips Oppenheim. German Leopold von Ragastein meets his doppelganger, Englishman Everard Dominey, in Africa, and plans to murder him and steal his identity in order to spy on English high society just prior to World War I. However, doubts of the returned Dominey's true identity begin to arise in this tale of romance, political intrigue, and a (literally) haunting past. E. Phillips Oppenheim, the Prince of Storytellers (1866–1946) was an internationally renowned author of mystery and espionage thrillers. His novels and short stories have all the elements of blood-racing adventure and intrigue and are precursors of modern-day spy fictions.