Book excerpt: The Koh-i-Noor diamond known as the Mountain of Light, the world's largest diamond, was found in India, traveled from Golconda to the Mughal palaces in the north. Fought over, cursed at and occasionally lost, it finally reached the Sikhs in the Punjab, only to be seized by British agents eager to please young Queen Victoria. It now lies in the Tower of London where some say its curse controls the fate of the Windsor family. In Chasing the Mountain of Light, Kevin Rushby pursues the dramatic career of the Koh-i-Noor on a journey to the heart of Indian culture meeting dealers, smugglers, and petty crooks along the way. It's another adventure from Rushby whom the Washington Post recently compared to William S. Burroughs and Arthur Rimbaud.