In 1929, 30-year-old gangster Al Capone ruled both Chicago's underworld and its corrupt government, and to a public who scorned Prohibition, "Scarface" became a local hero and national celebrity. But after the St. Valentine's Day Massacre transformed Capone into Public Enemy Number One, the federal government found an unlikely new hero in a young Prohibition agent named Eliot Ness. Chosen to head the legendary law enforcement team known as "The Untouchables," Ness set his sights on crippling Capone's criminal empire. Later inspiring two TV series and an Oscar-winning film, this true story is if anything more riveting, and it is recounted here by veteran mystery novelist Max Allan Collins and historian A. Brad Schwartz.