Overall, this is a good reference text for Acrobat. It tries to cover everything, which is admirable, but given the complexity of some Acrobat features, it covers some topics rather superficially.
A prime example is forms. Form development, fielding, data collection, etc. is a highly complex topic, and can't be covered in a few dozen pages. So, despite the title, you won't learn how to do "everything" but rather, will learn how to do most things, and become at least familiar with the rest.
I also didn't think it was worth the amount of time spent on very basic concepts, such as the differences between the various versions of Acrobat, and how to create simple PDFs from various applications. I would imagine that someone who buys this book already has a good grounding in the basics, and wants to bring their abilities to the next level. I would have preferred more detail on some of the more complex issues such as editing, graphics formats, combining different file formats, and so on instead of basic material.
Bottom line -- this is still well worth getting if you want a single volume that covers a wide range of topics. I found it far better than the materials/books Adobe puts out, and cost a whole lot less as well. It's clearly written and well-organized. But, if you want to go deep inside the nuances of issues such as form design, you'll need to purchase an additional book that specializes in just that topic.