What do you do after getting all of the library books on minish cap?

After collecting all the library books in "The Legend of Zelda: The Minish Cap," you can return them to the library to complete the collection. This unlocks a special reward: you receive the "Pez" item, which allows you to access additional content in the game. Additionally, you can use the information from the books to aid you in solving puzzles and understanding the game's lore better.