The Intelligent Investor is a seminal work by Benjamin Graham, considered the father of value investing. This book provides a comprehensive guide to making sound investment decisions, emphasizing the importance of analyzing a company's intrinsic value and buying when the stock price is significantly below this value. Graham argues that investors should focus on long-term returns rather than short-term gains, and avoid speculation. The book is filled with historical examples and anecdotes, illustrating the pitfalls of chasing short-term trends and the importance of having a margin of safety.