Talbot Mundy 
Caesar Dies [EPUB ebook] 

Putting Crime Over by Hulbert Footner. When Madame Roska Storey and her secretary are robbed, a plan is put in place to catch the robbers as well as their leader. She is the best private detective of England, but her stories are international. Her way to resolve the mystery is original and bring you in a new world. So we are introduced to the fascinating Madame Rosika Storey, fearless and intelligent, who plays cat-and-mouse with killers, goes undercover to break up criminal gangs, and unravels deadly mysteries. A strange, yet interesting tale that was actually written in the 1920s.