A site by site, crime by crime, outlaw by outlaw walking tour through the seedy underbelly of Roaring Twenties Manhattan—where gamblers and gangsters, crooks and cops, showgirls and speakeasies ruled the day and, always, the night. In Gangsterland, historian David Pietrusza tours the Big Apple’s rotten core. The Roaring Twenties blaze and sparkle with Times Square’s bright lights and showgirls, but its dark shadows mask a web of notorious gangsters ruling New York City.