Brisinger

Summary: This book is the 3rd book of Eragon, and its all about how Eragon uttered Brisnger which is a language for fire and not only can he use magic out of words but he has been challenged to his very core. And now he begins his challenge so that he may continue his journey to end Galbatorix's reign across the land. But first Eragon has an oath to his cousin, Roran to help rescue his beloved from Galbatorix, but Eragon owes his loyalty to the Varden, the elves and the dwarves.
Eragon is the greatest hope to free Alagaësia from the Kings tyranny.

The external conflict in book is Eragon vs. King Galbatorix (Person vs. Person).
This is external because Eragon is trying to end the King from destroying him and the rebellion since they're helping Eragon and because Eragon is the last Dragon rider. And Galbatorix is worried that Eragon will ruin all of his plans. On page 733 it says that Galbatorix uttered an oath, " Your philosophy does not constrain me, elf! I am the greatest of magicians, and on I will be even greater still. Death will not take me. You, however, shall die. And then I will kill you, Oromis, and I shall take your heat of hearts, Glaedr, and you will serve me until the end of time." This means that whatever Galbatorix wanted he won't stop until he gets it because he had done so much in the past to get this far in his plan.