This lavishly produced volume collects the speeches, essays, and talks of Charlie Munger — Warren Buffett's long-time partner at Berkshire Hathaway and one of the most original thinkers in the history of investing and business. Munger's central intellectual contribution is the concept of the "mental model" — the idea that building a latticework of knowledge across multiple disciplines, rather than relying on any single framework, produces far superior judgment in complex situations. He draws on physics, biology, psychology, mathematics, history, and philosophy to analyze business and investment problems, and argues that most errors in business and investing stem from the rigid application of single-discipline thinking. The book's centerpiece is Munger's famous talk on "The Psychology of Human Misjudgment," a comprehensive taxonomy of the cognitive biases that cause smart people to make foolish decisions, which predates and anticipates much of the behavioral economics literature. Munger's wit is as sharp as his intellect, and the book is full of quotable aphorisms and stories that illuminate profound ideas. Carrying a significant price tag due to its production quality, it has nonetheless become one of the most treasured books in the libraries of serious investors and business thinkers worldwide, and is regularly cited as one of the most intellectually enriching books ever compiled.