"The unbridled growth of crony unionism and government corruption will destroy the United States as we know it." This statement may strike many as sheer hyperbole. But its author, Mallory Factor, a political scientist at The Citadel, knows whereof he writes. His new book, "Shadowbosses: Government Unions Control America and Rob Taxpayers Blind" (New York: Center Street), makes a credible case, and a well-sourced one, that our country may be in the early stages of a ruinous dystopia, courtesy of public-sector unions. In pursuing their interests, argues the author, these labor organizations hold taxpaying citizens hostage to unsustainable wage/salary, pension,...