All 3 books from Standard and Poors (the S & P 500, the mid-cap 400, and the small-cap 600) are fantastic resources. You get the last 10 years of financial data for each company (those that have been around that long), including pre-computed values for things like profit margin, return on equity, debt-to-equity, and other ratios that are essential to making value-based investment decisions. Note that these are reference books, not "how to" books.
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