This is my post for Crime Fiction Alphabet letter O.
The Great Impersonation by E Philips Oppenheim published in 1920 deals with doubles, impersonation, espionage, spooky ghosts, a deranged woman, and a woman mad in love.
British citizen Everard Dominey chances upon German Leopold Von Ragastein in German East Africa. Dominey and Ragastein look alike. After a night of drinking and confessing about their respective exiles, Ragastein murders Dominey and takes his place in English Society spying for Germany. Will he make people believe that he is Dominey? Immediately after reaching London he chances upon Princess Eiderstorm, his former lover, who is bent on causing trouble for him. Will Leopold be successful in his mission?
I was getting more excited at the story that is not being told than the one that is told. I can't say much. I did figure out what was happening that was the reason for the excitement. There is a ghost story for the side which is spooky.
What makes some mysteries, where you figure out everything great and others disappointing? I loved this one!