A fine introduction to Habermas, this book is considerably more technical than other "Very Short Introductions" I've read. But in a very short volume, the author genuinely engages with Habermas' arguments, and he points out many of their major gaps and weaknesses. The book is particularly strong on how Habermas's linguistic theory, ethics, morality, political theory, legal theory, and treatment of religion all fit together. I didn't previously realize the extent that Habermas has developed a complete system, and I greatly his ambition, even if I'm not quite that human beings communicate as well as Habermas hopes.