Lord of Light

In a distinguished career which produced many bold, award-winning works, this towering tale of invention and adventure may be Roger Zelazny's single most brilliant achievement.
Earth is long since dead. On a colony planet, a band of men has gained control of technology, made themselves immortal, and now rule their world as the gods of the Hindu pantheon. Only one dares oppose them: he who was once Siddhartha and is now Mahasamatman. Binder of Demons, Lord of Light.