It's actually $120/hour. ;-) More seriously, you'll probably find the book to be less "marketing heavy" than that. Here is what Peter Cooper, of Ruby Inside fame had to say about the book (he was an early reviewer):

"Technical Blogging confidently straddles the line of showing exactly what a blog can do for you or your career, while being grounded and practical enough for us technical folks not to start running away from marketing speak. Antonio has done a great job."