The Intelligent Investor
The foundational text of value investing. Warren Buffett calls it 'by far the best book on investing ever written.' Mr. Market, margin of safety, the distinction between investing and speculation — these concepts are the bedrock. Dense and demanding, but every serious investor eventually finds their way here. You can skip it, but you'll reinvent its lessons the hard way.
Graham wrote for a market of railroad bonds and book values, and much of his arithmetic no longer finds anything to buy. The modern edition doubles in size with commentary explaining why each chapter still matters, which is its own admission. Chapters 8 and 20 carry the whole framework; the rest is period detail delivered in actuarial prose.
The case for it and the rest of the canon open with Pro.
