Iran's nuclear Saga presents a conceptual and analytical analysis of these threat perceptions at regional and global level. This book endeavors to investigate the possibility of nuclear chain reaction in the region. For this purpose, this book has particularly focused to assess the political and security implications with regard to six gulf monarchies called GCC and Israel. The book also offers an in- depth analysis of Iran's nuclear deal brokered among Iran and Western powers in 2015 and its fate.