"NORAD: In Perpetuity and Beyond" by Andrea Charron and James Fergusson is a well-researched and scholarly book that explores the evolution and missions of the North American Aerospace Defense Command (NORAD). The authors take a functionalist approach to explain how NORAD has adapted to changing security threats, from its origins in 1958 to its current challenges involving hypersonic weapons and cybersecurity. The book covers topics such as air control, deterrence, drug interdiction, counterterrorism, and the complexities of the maritime and Arctic domains. It also examines NORAD's command structure, communication systems, and the future of the organization. The authors provide extensive citations and use engaging narratives to highlight key dilemmas and vulnerabilities faced by NORAD. This book is recommended for advanced undergraduate or graduate students interested in international organizations and military history. [Extracted from the article]