The Madness of Pelagius is a short biography of one of Tamriel’s most well known Emperor’s, written by Tsathenes. As you will intuit from the title, it is largely a comment his descent into madness, rather than a history of his life and important acts.
The tome can be found by the Dragonborn in Dragonsreach Jarl’s Quarters, on a shelf in Proventus Avenicci’s room. Players with the Dawnguard DLC can also find it in Volkihar Keep, on a wall shelf in the upstairs section of Harkon’s quarters.
Reading by: Steve (@thedicenerd)