This book was highly recommended to me, otherwise I would not have read another Patrick Lencioni fable. His writing is boring, low-level, and implies childlike readers. A full book is printed to walk the reader through a simple set of ideas that could have been communicated in just a few pages.
The idea of the book, which is to have meetings (but better ones) is totally valid. We already use some of those concepts, and I will likely be testing the ones we're not using.
Save yourself some time, though, and just read the summary pages at the back of the book.