Cracking Your Retirement Nest Egg (Without Scrambling Your Finances): 25 Things You Must Know Before You Tap Your 401(k), IRA, or Other Retirement Savings Plan
Provides a wide range of retirement advice, identifying key steps for enabling a financially secure retirement as based on the guidance of top planners, covering such topics as recent tax law changes and understanding IRS regulations on savings withdrawals. 15,000 first printing.
This book was decent and is a pretty good reference for the various rules around 401k, retirement plans and social security. But it was published in 2003 and already some of the information is out-dated and inaccurate. If you keep that in mind you can still get some good general information. Just keep in mind that you probably should verify the details with more current information before you act on it.