Chapter 7 Summary

The next day, they have Potions with Snape. Professor Snape makes the lives of all but the students of his own house, Slytherin, miserable. They find out during potions that Sirius Black has been spotted near the area of the school.

Hermione keeps appearing unexpectedly and Ron is confused as to why she is carrying so many books with her. Their next class after lunch is Defense Against the Dark Arts with Professor Lupin. He is the same Lupin who saved Harry from the Dementor on the train ride to school.

The lesson starts with a lesson about Boggart's, shape shifting spirits who become whatever their victim's worst fear is. He tells the students they must think of something funny to deflect the Boggarts and also cast the spell "Riddikulus!." Lupin releases a Boggart and calls the students up one by one to...