"Lord of Light" is a science fiction novel written by Roger Zelazny, published in 1967. The story is set on a distant planet where a group of humans has gained god-like powers through advanced technology. They use these abilities to create a pantheon of deities, drawing inspiration from various mythologies, including Hinduism and Buddhism. The protagonist, Sam, also known as Mahasamatman, challenges the established order by seeking to free humanity from the oppressive rule of the gods. The novel explores themes of reincarnation, identity, and the nature of divinity, blending philosophical ideas with a rich narrative and vivid world-building.