The Five Rules for Successful Stock Investing: Morningstar's Guide to Building Wealth and Winning in the Market - by Pat Dorsey
Although it has a terrible title, it is probably one of the best introductions to value investing that I have read. It starts out covering all of the basic topics: research, moats, margin of safety, long term holding, selling. It also gives several mistakes to avoid in investing.
After going through that, it goes through basic accounting and financial statements with several examples. It also points out several accounting tactics to look out for.
It wraps up these sections with valuation and intrinsic value, with examples. Finally, it covers several industries with information on what to look out for.
Overall, I would recommend this book first (or close to it) for people getting into investing.