No, it's not a book that's majorly in-depth, and it won't reveal anything new to anyone at all seriously interested in things the mainstream media doesn't tend to tell us, because they'll know most of the facts already. But that isn't really the point of the book, is it? It's 50 things that most people - the most people who mostly get their information from the mainstream media, that most people - don't know about.
And some of them are pretty darn important. Like the US making plans to provoke terrorist attacks as part of the war on terrorism; juries right to judge the law, not just the fact; the obligation (or rather non-obligation) of the police; medical error and prescription drug death rates (amazingly high).
Other facts are more amusing and interesting than they are important, but even the entries that seemed rather obvious to me (the rather duh fact that advertisers exercise massive control over the media, for instance) contained interesting figures, facts and research.
If you've already read up on these kinds of topics, this book isn't going to add anything much to your knowledge. But it's a great little book to have sitting in your bathroom or on a table in a waiting room for other people to leaf through!