Who is it for? I would recommend this book for art directors, project managers, web designers (all levels), interactive designers, DVD menu designers (though not directly related, you can still take away some important aspects or "patterns"), and especially those that design online training modules (we all know how dull they can be.) Like the DVD menu designers I mentioned above, I think Flash designers can benefit greatly, as well. Though the book is not directly geared toward Flash design, the patterns and "anti-patterns" talked about can easily be used when designing for a Flash experience.
The layout of the book is broken up into the 6 "principles" described in the product description of this book. The sections "Make It Direct" and "Stay on the Page" are by far the two largest sections, for they are the most important of the 6. "Keep it Lightweight" is the shortest section/principle, but by no means is rushed or glossed over. It poses some great design ideas to keep it intuitive, discoverable and keep you from designing 'mouse traps.'
This book could also help bridge the gap for some managers by equipping them with the correct terminology of web design. Just speaking the language of user interface design can help speed up the time it takes to turn your directions into an interface that works the way you intended.
The book is detailed and to the point of the benefits of discoverability and weighing your options in the case of just how intuitive you need to make the interface. This book does not read like a my-way-or-the-highway kind of book. Scott mentions the potential pitfalls, disadvantages and possible alternate scenarios that depend on your interactive goals as set by the audience visiting your site.
A good number of the examples are from Yahoo! and Netflix sites (because Scott used to work for Yahoo! and now works for Netflix), but I never once felt like it was an advertisement for either one. He manages to spread the love around and uses examples from the Gap, iPhone, blogs, Google, Amazon, and others.
In short, the book is an easy read, something that one could go through in a long weekend. There are screenshots and visual examples on virtually every page, so in no way are we left to imagine the event happening. Multiple screenshots are taken when the event happens over the period of several steps. There is even a couple free companion web sites that will show the screenshots in a larger format than the book would allow. While reading the book, you will undoubtedly have many 'ah ha!' moments, or times when you rush to check your previously-designed web sites to see if you need to make a correction to your interface (admit it, we all do.)
I highly recommend this book for anyone that designs interfaces, even if they are for mp3 players, touch screens for electronics, or those interactive lobby displays. We all need some help in the area of user interface design.
***NOTE: there is NO code in this book. This the theory of designing user interfaces for the web, NOT the code.