This book investigates the rise and reign of organized crime in Chicago during the Prohibition era. Clive Gifford, an established author of non-fiction works for young readers, draws upon historical accounts and journalistic records to present a narrative of the city's most notorious gangsters. The book aims to provide an accessible overview of the key figures, their illicit activities, and the societal impact of their operations.

This work is likely positioned as an informative overview for a younger audience, given the author's typical readership. The subject matter suggests a focus on factual reporting of historical events and figures rather than deep analytical critique. It appears to offer a straightforward, chronological account of the Chicago gangster era, suitable for educational purposes or general interest in true crime history.