Book excerpt: This book provides some important perspectives on the emerging nuclear order. The contributors discuss most burning questions of the day: What are the challenges to the global nuclear regime? What are the consequences of a nuclear Iran for West Asian peace and stability? Will it give rise to a nuclear quest among the important West Asian states? How would the West respond in such an eventuality? What would be the response of major Asian powers to nuclear Iran? What are the consequences of changes in the East Asian nuclear order for stability and peace in the region and beyond? How would major regional players respond? What are the implications of non-state actors acquiring nuclear weapon technology and capabilities? What did the international community learn from the discovery of the A.Q. Khan network? What are the possibilities for international cooperation against nuclear proliferation?