第十章（110）

 Chapter 10: The Marauder's Map  

Hermione discovers a mysterious map called the Marauder's Map, which shows the entire Hogwarts grounds, including secret passages and the locations of people in real-time. The trio learns that they can use it to navigate Hogwarts discreetly. They also find out that the map was created by Harry's father and his friends. The chapter is significant for revealing more about Harry's parents and their past while introducing the concept of loyalty among friends. It also adds an element of adventure as they plan to use the map to explore Hogwarts. The friendship between Harry, Ron, and Hermione strengthens as they delve deeper into their magical education.