Used the 2019 version of this book to prepare for an oral exam about the third wave of CBT. It was rather hard to get a good overview of some of the therapies' theoretical background and history, often I had to use the book in combination with google. Some chapters, like those on mindfulness-based therapies, only give a really brief description that does not really add information to more general books about behavioral therapies or clinical psychology.
It does sometimes give elaborate and good examples of how a treatment would look and what it would include. Sometimes examples of specific techniques are used an the techniques only explained pages further. The chapters seem to be written by people involved with that type of treatment, instead of one person from one theoretical inclination writing everything, so I suppose that's good.
Generally I would not recommend this book as a perfect study guide, but since I could not find anything that gave a better, non-biased to one treatment type kind of overview like this I would still think this to be the best you can get that's actual in 2019.