Rising China and emerging India are becoming major maritime powers. As they build large navies to secure their growing interests, both nations are roiling the waters of the Indo-Pacific-the vast littoral stretching from Africa to Australasia. Invoking a tale from Hindu mythology- Samudra Manthan or "to churn the ocean"-C. Raja Mohan tells the story of a Sino-Indian rivalry spilling over from the Great Himalayas into the Indian...