The Intelligent Investor, Rev. Ed

In Investing, Benjamin Graham's "The Intelligent Investor" -- when I read it I was already heavily influenced by Graham's thought (he essentially invented security analysis and value investing, so he has many disciples, but first and foremost is the guy to whom Graham gave the best grades ever, when he attended Graham's course at Columbia University in New York: Warren Buffett, who still reveres and honors Graham's memory), but reading the book itself -- so clear, sharp, simple -- still made a huge impact on me.

-- Alex Martelli