What does owl eye find so interesting about the books in Gatsby's library?

Owl Eyes is fascinated by Gatsby's library because it contains a collection of real, unread books, which symbolizes Gatsby's façade and the illusion of his wealth. He is intrigued by the fact that the books are not just for show; they bear the marks of authenticity, suggesting a deeper layer to Gatsby's character. This contrast highlights the themes of appearance versus reality in the novel, as well as Gatsby's desire to project a certain image while remaining fundamentally isolated and misunderstood.