Shifting Moons

Twelve-year-old Sirius Black knows something is going on with his best friend, Remus Lupin, and he thinks he can guess what.

Remus Lupin is a werewolf.

After an encounter in the library leaves him desperate to prove his theory and protect his friend, Sirius follows Remus into the Shrieking Shack on the night of a full moon. The Gryffindor gets more than he bargained for though when Remus bites him, leaving Sirius floundering.

Now, Sirius has another question: are he and Remus the monsters everyone says they are?