This book investigates the core methodologies and psychological traits that distinguish the most successful investors in modern financial history. John Train, an experienced investment advisor, analyzes the careers of nine prominent figures to extract actionable principles for market participants. By examining the specific strategies of these masters, the author constructs a framework for understanding how consistent profitability is achieved through disciplined investment philosophies.

Financial experts frequently cite this work as a foundational text for understanding the historical development of modern investment theory. Readers often note that while the prose is accessible to non-professionals, the depth of the analysis remains relevant for seasoned market participants.