Harry Potter and the Prisoner of Azkaban (Harry Potter, #3)

by J.K. Rowling

“I’m not going to be murdered,” Harry said out loud. “That’s the spirit, dear,” said his mirror sleepily.

“What?” Ron said again, holding Scabbers close to him, looking scared. “What’s my rat got to do with anything?” “That’s not a rat,” croaked Sirius Black suddenly. “What d’you mean — of course he’s a rat —” “No, he’s not,” said Lupin quietly. “He’s a wizard.” “An Animagus,” said Black, “by the name of Peter Pettigrew.”

“You think the dead we have loved ever truly leave us? You think that we don’t recall them more clearly than ever in times of great trouble? Your father is alive in you, Harry, and shows himself most plainly when you have need of him. How else could you produce that particular Patronus? Prongs rode again last night.”