Howard Marks's The Most Important Thing distilled the investing insight of his celebrated client memos into a single volume and, for the first time, made his time-tested philosophy available to general readers. In this edition, Marks's wisdom is joined by the comments, insights, and counterpoints of four renowned investors and investment educators: Christopher C. Davis (Davis Funds), Joel Greenblatt (Gotham Capital), Paul Johnson (Nicusa Capital), and Seth A. Klarman (Baupost Group).

These experts lend insight into such concepts as "second-level thinking," the price/value...