Brisingr

Eragon and his dragon Saphira have suffered a horrible betrayal two days ago. He has learned his unknown father is Morzan, leader of the foresworn, servants to the dark king Galbatorix, and his brother, Murtagh, has been forced to turn evil. He often wishes he had never found a large sapphire that hatched into Saphira. If he'd never said where it came from while attempting to trade it...He cannot spend much time dwelling on the past. He needs to help his cousin Roran rescue his girlfriend Katrina from the clutches of evil monsters, and assist the rebellion movement, the dwarves of Tronjheim, and the elves of Ellesmara, all while attempting to find out just why Galbatorix gets more powerful year by year.