Nunzio Pernicone's biography uses Carlo Tresca's (1879-1943) storied life'as newspaper editor, labor agitator, anarchist, anti-communist, street fighter, and opponent of fascism'as a springboard to investigate Italian immigrant and radical communities in the United States. From his work on behalf of the Industrial Workers of the World (IWW), the Sacco and Vanzetti Defense Committee, and his assassination on the streets of New York City, Tresca's passion...