India's internal security is a subject of such immediate political and social relevance that it is not often the subject of rigorous academic study. That gap has been filled by this volume edited by Amit Ahuja and Devesh Kapur, two scholars with outstanding credentials, covering the institutional, doctrinal, organizational, and other aspects of this contentious subject. The volume thus takes an integrated view of India's internal security. Its strength lies in its reliance on data, the coherence of its arguments, and the reliance on academic disciplines honed in other contexts. All in all, a significant book on an important subject that will become ever more relevant as the pace of change in India accelerates in years to come.