"Since the first edition was published in 2008, a lot has changed - both for Google Analytics and web as a whole. Remember two years ago hardly anyone had heard of Twitter. In that time GA has integrated with AdSense and Feedburner, launched event tracking, advanced segments, Intelligence alerts, motion charts, custom reporting, custom variables and data export API. The new edition covers using all of these in detail from a practitioners point of view and with as many real-world examples as I could muster."
It's very well written and readable with screenshots - a great resource for all things Google Analytics.
More Info: Amazon