"Twenty Years a Detective in the Wickedest City in the World" is a fictional book that focuses on the concern of the author, Clifton R. Wooldridge regarding the act of swindling now popular within the modern population. The author is popularly referred to as the real-life Sherlock Holmes for his exceptional role as an officer of the law. With the experience of Detective Wooldridge, he gives a clear description of various forms of crimes committed by swindlers in the city of Chicago.