An overview of a dozen major styles of psychotherapy, comparing different aspects of each. The book is very academic and in general very dry. It's abstract and academic feel does not give a good feel for the style; even still, it gives a good overview of each style in technical terms.
I have the first edition text, which differs from the second in that it includes Gestalt therapy as an independent therapy. In the introduction to the second edition Messer explains that in the time since the first edition Gestalt therapy has waned and is hardly ever practiced as an independent therapy style; instead elements have been incorporated into other styles. Also other therapies have been added, including "Post-modern therapy," which I have never heard of as a therapy in any other text. Once again, I never read the second edition, but at first glance it seems the first edition is superior.