Eldest

SPOILER ALERT!

After defeating the Shade Durza in the battle for Farthen D?r, Eragon is told he must visit the sprawling expanse of Du Weldenvarden and meet with the elves. Eragon is torn by this decision, as he is the only Dragon Rider in existence, save for the mad King, Galbatorix. He doesn't want to leave the dwarves and the Varden (a group committed to overthrowing the king) without protection while he trains with the elves. Also, in his fight with Durza, Eragon was tragically wounded across the back. But, the wound would have possibly killed him if The-Cripple-Who-Is-Whole hadn't visited him in his comatose state and given him the strength he needed to survive.

Eragon's debt to the cripple who saved him eventually drives him to leave the Varden for Ellesm?ra - an elfin city. Eragon discovers the cripple is an elf named Oromis, and that Oromis is a Dragon Rider. He was captured by the Forsworn (the 13 Riders King Galbatorix rallied to conquer Alaga