Wow! I'm an intermediate PTLE user, and this book blew me away. Now I know what's been missing from my mixes, and what to do about it.
This is not a book for beginners, although the initial section on setting Preferences for professional workflow is something I'd never seen covered in any other basic PT book. The authors explain WHY certain preference settings make your life easier or harder, and where certain settings can cause PT to behave in unexpected ways. The other feature for beginners is to show what to aim for in the way of pro quality results. However, the book assumes that the song, arrangement, playing, tracking, and basic mixing (EQ, comp, volume/mutes, panning, etc.) has been done to a reasonable quality level. The material covers the last 10% of tightening the rhythm and fixing any vocal glitches that separate a potential gold-record result from a semi-pro effort.
After getting the book, I went into a session I'm doing with some rather complex rhythm parts over a synth drum loop. After "pocketing" the parts, the song now sounds much crisper and more alive, but not mechanical. (NOW I know why I should have recorded the loop to a grid, and driven the synth from PT's clock. Oh well...) My next step will be to clean up the vocals, using the book's suggestions for using Auto Tune. Now I understand why I was always a bit dissatisfied with Auto Tune, even in Graphic mode.
Overall, the book is very well written and edited, and covers not just the easy situations but tells you how to handle a number of real-world oddities. Most of the text is accompanied by screen shots (including before / after, where appropriate.) The DVD is also very helpful, and I found myself really understanding material by referring between the text and the DVD.