Question

Why do you think the author chose to rewrite the story of Beowulf from Grendel’s point of view?

Answer 1

It is called the third person or the Omniscient.  To present Beowulf's thoughts, for instance, the narrator adopts the point of view of an omniscient author and gives us a glimpse into Beowulf's mind; or he causes Beowulf to reveal his private thoughts by having him declare them through a public utterance. In either case, a reader's attention is directed toward Beowulf.