For those folks starting out (or don't know where to start), my personal recommendation is: The Automatic Millionaire.
Admittedly this is a bad title. And if it wasn't for Oprah promoting it - I would not have known about it. It's a great book if you don't know where to start and has helped me tremendously in starting my investing on the right track.
Here's a link to Amazon:
Amazon.com: The Automatic Millionaire : A Powerful One-Step Plan to Live and Finish Rich: Books: David Bach