Harry Potter & the Half-Blood Prince | J.K Rowling | Book Review N°06

“I enjoyed the meetings, too. It was like having friends.”

“Do you remember me telling you we are practicing non-verbal spells, Potter?"

"Yes," said Harry stiffly.

"Yes, sir."

"There's no need to call me "sir" Professor."

The words had escaped him before he knew what he was saying.”