The passage lists a few things which would lend towards the idea of him being a monster. First, it says "god's anger bare he." referring, presumably, to the abrahamic god famous for his wrath, showing that Grendel was exhibiting intense rage. Second, it uses the sentence "The monster intended some one of earthmen in the hall-building grand to entrap and make way with" which, while a written a little backwards by today's grammar rules, says that he is planning to take hold of and kidnap some of the men in the hall, something only a monster could do.<span />
Well, it depends on the genre of that non-fictional book. For instance, a mystery book would make the audience interested if there was an unsolved mystery included, but an adventure book, for instance, might hook the reader if it was actually based on historical events and something like the book described had actually happened. Therefore, for a fictional book, I would say all of these interest me depending on the type of book.
On the one hand, a <u>gerund</u> is a verb that acts as a noun, know for the -ing form. On the other hand, an <u>infinitive</u> is the basic form of a verb, that usually follows "to" or another verb form. The revised sentence, including both of these, is:
"To give is one of the best things people can do. Volunteering their time shows what caring people they are."
