Serrin, William. Homestead: The Glory and Tragedy of an American Steel Town. New York: Vintage, 1992.
Perhaps the single best book for capturing the 20th century in steel: Serrin combines a reporter's eye for a story with the historian's attention to detail to tell an extended case study of Homestead, Pennsylvania.
Referenced in:
Making Steel
Bost Building [1892 Homestead Strike]