Answer:
clarise's death fascinated guy.
Explanation:
Honestly I would think he’s just drunk and surprised about the books. Or that Gatsby took his time to fill shelves with books and on how grand it is. Just in awe with the luxury I guess.
It does not really matter which form you write in. However, writing in the third person omniscient is generally more effective for essays. If you were writing, say, a blog, you would use the first person, but in this case, I think you want to use the third person.