Idiots.
From CBC News:
While the fire didn't cause any significant damage, the fire extinguisher used to douse the flames left many books and parts of the floor covered in residue.
Two 12-year-old boys have been charged with arson.
Fire officials say it's believed a paper cup was lit on fire and dropped through the book return slot.
I say: Bring back the stocks in the town square!
(We watched the first disc of The Office (Season Two) last night. I think that Dwight might be rubbing off on me. Which is a little frightening.)