The book under discussion analyzes the impact of Russia's war on Ukraine on the global nuclear order, particularly focusing on the challenges it poses to the 1968 Treaty on the Non-Proliferation of Nuclear Weapons (NPT). It delves into the erosion of nuclear norms, the increasing attempts by states to develop nuclear weapons, and the use of nuclear coercion in territorial disputes. The authors highlight the deficiencies in the current arms control system exposed by the war and explore the growing divide between NPT supporters and proponents of the Treaty on the Prohibition of Nuclear Weapons (TPNW). The book also engages with the debate on nuclear deterrence versus disarmament and examines the rise of new missile technologies and disruptive innovations like hypersonic missiles, drones, and artificial intelligence. It is aimed at students, scholars, and policymakers interested in international relations, security, and the effects of the Ukraine conflict on nuclear strategy.