"We are Nikolai Svechin, Valery Vvedensky, and Ivan Pogonin—authors of historical detective stories. Our literary heroes investigate crimes in the Russian Empire in the late 19th and early 20th centuries. And though, by historical standards, not so much time has passed since then, life and people’s everyday habits, their psychology, behavior, and ideas have changed immensely. And in order to describe that era without blushing later in front of knowledgeable people, before we sit down to write another story or novel, we study sources: memoirs and diaries, newspapers and magazines, reference books and reports, scholarly works of those years, and fiction. However, far from everything we know can be “packaged” into the format of a work of fiction. That’s why, for a time, many interesting facts stayed in our notebooks. And then the idea came to write this book: to tell about the history of the St. Petersburg detective police, about how criminals were searched for in those earlier times in the capital, about the fates of royal detectives and the cases they solved…»