Prelude to Foundation is the prequel to the Isaac Asimov's famous Foundation series. Set in 12,020 GE (Galactic era), Trantor, the governing planet of the Galactic Empire, is a big technology aided civilization. On the throne of Trantor sits Emperor Cleon who seems worried about his fall. Hari Seldon, a young professor of mathematics is from a distant world. He travels to Trantor to present a paper on a new field, known as psychohistory, that can predict the future. Emperor's agents are behind Seldon now for it is he who can save the Empire. Seldon hides himself in different places throughout Trantor. In the process of developing his theory, he discovers some surprising facts and events about Trantor, its society and cultural shifts. Filled with lots of twists and turns, read it for an entertaining and engaging classic Sci-Fi saga.