Brisingr

in this books eragon keep his seven promisses, eragon go with roran to find katrina that being held by ra'zac and then married them. swept the course from elva even its not completely works, fixed the Isdhar mitrim in farthen dur when orik is become the 44th king of the dwarf. get back to elesmerra and meet the oromis. orois tell him that his father is not morzan but he is brom. After the Zar'oc take by his brother, hi looking for rhunon a blacksmith in elesmera. Eragon doesnt have a sword that fit with him as a dragon rider, and he remember solembum the cat had told him that if he need a sword he can find it under the menoa tree.

after he got that brightsteel, rhunon-elda  help him to make the riders sword and gave it a name "Brisingr". this sword is shiny when eragon call it name. in the last day glaedr told eragon about the weakness of galbatorix and the secret of eldunari.eldunari that belongs to glaedr is give it to saphira, and oromis it self decide to show him self in the front of galbatorix.

Oromis and glaedr againts thorn and murtaghin gil'ead, suddenly galbatorix show himself in the front murtagh and kill oromis.atthe meantime eragon and arya who fight againts shade saw that murder in his mind. finally eragon and saphira become tha last rider and has to face galbatorix all by himself.