The book is a quick read, does not take reams of pages to get to the points it wants to make, and is overall a good addition to your stable of investment books. Like most authors, Daniel Solin, the author of this book, also recommends asset allocation as the chief mechanism to manage risk and ensure steady portfolio growth within 401(k). Of course when asset allocation is the primary vehicle of growth, and since most 401(k) plans do not permit stock trading, it is important to choose funds that are low cost, do not have a lot of churn, and can meet or beat the market consistently.
Vanguard Index funds frequently make their way into any asset allocation model, as it does here. However the author does suggest other methodologies such as using DFA funds through advisors for consistent market out-performance. Of course most 401(k) plans do not offer access to DFA funds or advisors, so Vanguard index funds may be the best option yet.
It is a reasonably comprehensive book, given its size, and definitely to be used as a checklist to ensure you are following most if not all of the recommendations provided herein.