The Legend of Eragon: The Inheritance Cycle
This is the legend of the Rider Eragon, who defeated Galbatorix and revived the Dragon Riders, saving Alagaesia....at least until Eadric came into power.
The Words of Death
This book explains, describes, and advises on the use and history of the twelve words of death in the Ancient Language.
Manins abr Wyrda
This book, intended to be a complete history of Alagaesia, is a collection of Eddison's Dialouges, the Chronicles of Ingothold, and Heslant the Monk's Domia abr Wyrda, as well as personal accounts or pieces of history that Riders and scholars have donated to the book. It goes right up to the year Galbatorix attacked the Ruins when it was still functioning as a base.