Hermione has finished reading the schoolbook. In fact, she's just finished reading it for the third time. She could quote a lot of it from memory now, and almost wishes she couldn't, because it's more than a little infuriating.

When she's sure Ron and Harry will be the only ones left in the Gryffindor common room, Hermione heads back to the Three-Toed Sloth campfire armed with her bag of Floo powder, and sets herself up with a good fire.

( Cut for length )

[Shhh. It's totally on time.]