Book excerpt: In God we trust, the rest we monitor . . . A former chief of India's external intelligence agency, the Research and Analysis Wing, deconstructs the shadowy world of spies, from the Cold War era to the age of global jihad, from surveillance states to psy-war and cyberwarfare, from gathering information to turning it into credible intelligence. Vikram Sood provides a panoramic view of the rarely understood profession of spying to serve a country's strategic and security interests. As a country's stature and reach grow, so do its intelligence needs. This is especially true for one like India that has ambitions of being a global player even as it remains embattled in its own neighbourhood. The Unending Game tackles these questions while providing a national and international perspective on gathering external intelligence, its relevance in securing and advancing national interests, and why intelligence is the first playground in the game of nations.