This is a really good, in-depth, book - but you need to be prepared for a lot of reading.
One thing I really like (-as I only have Elements 4.0) is that every feature explained details exactly which versions of Elements support it, so this is not just a book for Elements 7.0 owners (-despite the title). The author gives a lot of background and lots of photos and examples (-which of course ARE of v7.0) but that does not detract significantly.
One note of caution: the author is a Pro photographer, so newbies to the subject may be daunted by the depth - and the breadth - of the subjects covered. However, to it's credit, it IS a very well organised book and - if you feel a subject area is of no interest - it's perfectly possible to skip that section/chapter (-with the exception of the introductory ones I imagine) and just read the ones you desire.
Some of the chapters at the end read like afterthoughts and confused me: for example, there is a section on Adobe Lightroom, but I don't think the author sufficiently explained what it WAS before diving into it's various features, but as this is a book about Elements, that's small beer.
All in all, if you really want to get to grips with Elements and what it can (-or can't) do for you, then this is the one to buy. At over 400 colour pages, it's a steal at the price that Amazon is asking as well..