As it Continues

Istrali has been alone her whole life, untill a white dragon hatches for her. Named Castoren, he and Istrali are taken to Haven, the land Eragon has found, to be taught the ways of the Dragon Riders. When strange news comes, via the enchanted mirror, Istrali and Castoren are chosen to go back to Alagaesia and see what has happened. They find that Alagaesia is in danger, and they are the only ones who can save it.