Inheritance by Christopher Paolini

Read Inheritance online free Inheritance is the fourth and final book in the Inheritance Cycle written by American author Christopher Paolini
Inheritance opens with the Varden's siege on Belatona, a city of the Empire. In the battle, Saphira is nearly killed by a Dauthdaert (death spear) called Niernen—a spear from the Dragon Wars intended to destroy wards and kill dragons. Belatona soon falls, and an alliance is formed between the Varden and werecats.
Roran is sent on a mission to capture Aroughs, which proves to be a rather challenging task. He comes up with a risky, yet potentially rewarding, plan and Aroughs is taken, although Roran's force sustains many injuries. Roran rejoins the Varden at Dras-Leona when they are in the process of making plans to attack the city.
Murtagh and his dragon Thorn are occupying the city, thus eliminating the chance of pulling off a direct siege successfully. Jeod finds references to the start of a sewer system that was never completed under the city. Assuming the existence of a secret tunnel into the city, Eragon leads a small group (himself, Arya, Angela, the werecat Solembum, and an elf named Wyrden) into the city to open the gates for the Varden. It turns out that the tunnels are used by the priests of Helgrind, and Eragon and Arya are captured after being separated from Angela and Solembum and witnessing the death of Wyrden. Because the priests are angry at Eragon for killing their gods, they intend to feed Eragon and Arya to Ra'zac hatchlings. (Summary by Wikipedia)