Theodore Dreiser's trilogy, known as the “Trilogy of Desire,” comprises three novels: “The Financier,” “The Titan,” and “The Stoic.” The works tell the story of Frank Cowperwood, an ambitious financier whose prototype was the American millionaire Charles Yerkes. The trilogy traces his ascent to wealth and power, his downfalls and resurrections, and explores themes of American capitalism, human ambition, and morality in the world of big business.