The collection includes three detective stories, the main character of which is private detective N.F. Trubnikov. The ability of Colonel Trubnikov of the Ministry of Internal Affairs, who created a detective agency in Rostov-on-Don, to withstand blows, his analytical abilities and erudition attract many people to him. The poor and the rich come to him for help. He solves the mysteries of the most complex crimes. This book was created by the author from beginning to end. Coincidences of names and titles with the names and names of real-life persons and places are random.