In "A History of Economic Theory," Jürg Niehans masterfully navigates the intricate evolution of economic thought, tracing its roots from the nuanced debates of scholastic mercantilism to the sophisticated contours of modern mainstream economics. With an erudite yet accessible prose, Niehans embarks on a chronological expedition, exploring the foundational contributions of classical economists like Smith and Ricardo, through the revolutionary insights of marginalists from Thünen to Fischer, and culminating in the strategic complexities of model-building pioneers from Pigou and Keynes to the proponents of Rational Expectations. This work not only serves as a comprehensive account of economic theory's monumental journey but also as a vibrant tableau of the intellectual giants whose visions have shaped our understanding of economic dynamics. Beyond the mere chronology of ideas, Niehans delves into the personal journeys of these economists, offering biographical sketches that bring to life their challenges, triumphs, and the historical context of their contributions. Each chapter becomes a narrative of discovery and debate, critically assessing the impact of each theorist's work on the tapestry of economic thought. "A History of Economic Theory" emerges as an essential tome for economists, scholars, and anyone intrigued by the forces that drive markets and influence fiscal policies. Niehans not only pays homage to the legacy of economic theory but challenges readers to consider its future trajectory in the light of past innovations and insights.