This book fails to provide a knock down argument for pragmatic accounts of meaning, and provides an even more sketchy argument for speech act pluralism, but in order to built this argument the book does provide a clear and sustained argument to say that more moderate pragmatic accounts must collapse to the more radical pragmatics of philosophers like John Searle and Charles Travis (both of who - incidentally - were students of J.L. Austin)
The book is ultimately extremely narrow in scope and yet not very deep or convincing as such it makes for very stale reading.