The book was the required text for a Security Studies subject I did as part of International Relations Masters last year. I read the first three chapters before I started the course, and then only made it through a few more chapters before the end of the course - its busy work studying and holding down a full time job. Nonetheless, despite my limited progress during semester, I actually found this to be quite interesting for a text book. It comprehensively covers over thirty topics within the security studies discipline, including environmental and energy security, as well as the future of discipline and the challenges of academia versus policy. The text never gets too academic, so its easily readable by anyone who grasps the basics of the humanities. I would definitely recommend this book to anyone studying in the security studies discipline.