I wouldn’t say it is too far out of date, having just gone through all of it in the past few months. That said, Bazzell does provide a lot of smaller updates in his Unredacted magazine articles. I believe he said he is no longer planning to update the book because he couldn’t afford to take the time since the book was being torrented a bit too much (I might be misrembering). Either way, his magazine is really good too. I became a big fan of his after that first book.