"Eldest" is the second book in the Inheritance Cycle series by Christopher Paolini. It continues the story of Eragon, a young Dragon Rider, as he faces new challenges in the land of Alagaësia. The narrative explores themes of power, responsibility, and the struggle against tyranny. In this installment, Eragon trains with Brom's son, Murtagh, and learns more about his abilities and the history of the Dragon Riders. Meanwhile, the antagonist, Galbatorix, grows stronger, and Eragon must unite various factions to combat the looming threat. The book deepens the lore of the series and develops its characters further.