Robert G. Hagstrom is a prominent investment author and portfolio manager best known for his book "The Warren Buffett Way," which provides insight into the investment strategies and principles of Warren Buffett, one of the world's most successful investors. Hagstrom's work typically emphasizes long-term investing and the importance of understanding a company's business, management, and financial health before investing. His other notable works include books like "Investing: The Last Liberal Art" and "The Essential Buffett: Timeless Principles for the New Economy." His writing combines practical investment guidance with a deep understanding of value investing philosophy. Hagstrom's expertise has made him a respected figure in the field of finance and investment literature.