The Mandrake Machine. Valentin & The Widow: Book One
by Andrew Wheeler
1924. Aristocrat Eleanora Rosewood is in Shanghai on a search for a doomsday machine created by her late husband. With the help of troubled Russian sailor Sacha Valentin she faces intrigue and danger, spies and assassins, and a formidable lady gangster as she attempts to save the city from destruction.
The Mandrake Machine is book one in the Valentin & The Widow novella series.