: Fans on Reddit have noted a book in the background that appears to feature the Ice King's crown and ice shards.

Community reviews on platforms like Reddit often describe the episode as a "missed opportunity," with some fans feeling that the library setting and the character of Paper Pete could have been explored with more "pizzazz" or depth. Paper Pete | Adventure Time Wiki | Fandom

: Finn meets Paper Pete, the leader of the Pagelings, who reveals they are at war with the Moldos , mold-like creatures that eat and destroy the library’s books.

In the Adventure Time episode (Season 3, Episode 22), the plot follows Finn as he discovers a secret society of "Pagelings"—tiny paper people—living in the library while Jake is busy trying to learn about Rainicorn history. Episode Overview

: Finn helps the Pagelings fight off a Moldo attack. Eventually, the Moldos retreat, though they vow to return. Jake remains oblivious to the reality of the war until the very end. Key Details & Trivia

: The episode centers on Jake’s skepticism. He believes Finn is just playing "make-believe" and refuses to acknowledge the tiny creatures, even as they crawl on him and try to get his attention.