This book gives a good introduction to argumentation theory and its twists and turns over the course of its existence. I found it helpful to get started, especially coming from a completely different field. It gives the essence of Toulmin and Perelman and Olbrechts-Tyteca but I would have liked to see a bit more on Austin and Searle.But then again the references mentioned are very extensive and can be followed up. All in all a good book if a bit pricey for students (whatever happened to the paperback cover?)