17-year-old Ruby Thomas, newly responsible for her two young nieces after a devastating tragedy, is determined to keep her family safe in the vast, swirling world of 1920s New York City. She's got street smarts, boundless determination, and one unusual skill: the ability to throw a ball as hard as the greatest pitchers in a baseball-mad city.
From Coney Island sideshows to the brand-new Yankee Stadium, Diamond Ruby chronicles the extraordinary life and times of a girl who rises from utter poverty to the kind of renown only the Roaring Twenties can bestow. But her fame comes with a price, and Ruby must escape a deadly web of conspiracy and threats from Prohibition rumrunners, the Ku Klux Klan, and the gangster underworld.