This would definitely not be my choice of textbook for undergraduates. However, for graduate students that need an overview of the major theories of IR - this is one of the best books I've seen to date. Each chapter is written by a prominent academic and focuses on a one of the major theories. Moreover, the chapters name all of the major theorists and their contributions, as well as giving an in-depth look at one major book or article and a case study for each theory. The first two chapters also talk about the great debates in the field and give a general overview of what theory is (focus on normative). The concluding chapter looks to the future of the discipline. In sum, this book is perfect for a doctoral student that needs a good balance between an overview and some specifics - as in if you are reviewing for comprehensive exams or taking an intro to IR theory course.