Mr. Marlow's book starts out OK; the first few chapters are informative and interesting. General Internet usage statistics are provided, along with some pearls of general Internet wisdom.
However, the content of the book does not measure up to titles of the various chapters (the chapter titles suggest interesting and useful information to those embarking setting up a web site, the opposite is true).
The book is basically a data dumb of interviews conducted over the last 3 years. There is very little summarization or structure to the presented material. Furthermore, and most importantly, there are no conclusions drawn about who did what right, what works, and what new netizens should do when constructing their own site. Lastly, the book's data dump format makes it very difficult to extract any valuable information.
I found myself only skimming the last half of the book because of it's weak and redundant content.
One caveat, I am intimately familiar with the online world, so maybe a novice would find the book useful