1. The Motley Fool's How to Invest
How To Invest
2. Benjamin Graham's The Intelligent Investor
The Intelligent Investor
3. If you like The Intelligent Investor then try Benjamin's Security Analysis. But that one is not a beginner book.
4. If you just want to save for retirement, start with a financial planning book, like this one: Smart and Simple Financial Strategies for Busy People
5. Stikky Stock Charts
This is a beginner's guide on how to read charts. Lots of charts, not too many words.
6. Get a Financial Life