David Dreman is a well-known investor and author, recognized for his expertise in value investing. He founded Dreman Value Management, a firm that focuses on identifying undervalued stocks. Dreman is also known for his contrarian investment strategies, which involve buying stocks that are out of favor with the market. In addition to his investment work, Dreman has written several influential books, including Contrarian Investment Strategies. His writings emphasize the importance of psychological factors in investing and advocate for a disciplined approach to stock selection. Dreman's insights have made a significant impact on the field of finance and investment.