The author of the famous book "A Brief History of Time" is Stephen Hawking. Published in 1988, the book explores various topics in cosmology, including the origins of the universe, black holes, and the nature of time itself. Hawking's intention was to make complex scientific theories accessible to the general public, and the book has been lauded for its clear explanations and insightful reflections. It became a bestseller and has played a significant role in popularizing science, establishing Hawking as one of the most celebrated theoretical physicists of his time, appreciated for both his intelligence and his perseverance despite physical challenges.