Book excerpt: "Marcus Klein makes major contributions to American studies, literary criticism, and intellectual and social history. In a perfectly crystalline and crystallized way, he brilliantly exhibits how the American imagination was rapidly, unexpectedly, and utterly transformed as we made for the twentieth century. Klein demonstrates how immigration, popular literature, the rise of ethnicity, new psychological fears, and old fables mixed together to make modern America. No one has seen the underside of the American imagination so clearly and originally; but once we are allowed to see what Klein does, our understanding of our history and its vicissitudes is changed for good."--Jay Martin, University of Southern California