The "U.S.A. Trilogy" is a series of three novels written by author John Dos Passos between 1930 and 1936. The books—The 42nd Parallel, 1919, and The Big Money—explore American society and culture during the early 20th century, focusing on the lives of various characters from different backgrounds. Using a unique narrative style, Dos Passos incorporates techniques like stream-of-consciousness and intersperses news clippings and biographies of notable figures. The trilogy reflects the social and political changes in the United States, capturing the complexities of the American experience during a time of rapid transformation.