Cory Doctorow is one of those cool hipster technologists with lots of opinions that are mostly well-founded, and an arrogant certainty that the opposing viewpoint is represented by Sauron and Emperor Palpatine.
This book is a selection of previously published essays, magazine articles, and conference presentations, mostly on the theme of copyright and intellectual property law, piracy, privacy, ebooks, and related matters. He makes some compelling arguments, but as these articles were mostly published between 2005 and 2007, they are already becoming dated and one can see that Doctorow is no more prescient than any other futurist.
The essays range from thought-provoking to trivial. He's released all of his books (including this one) as free ebooks, and argues that he's profited by doing so, but I am not convinced that every writer can be Cory Doctorow and succeed with the same business model.