“You put a spell on the dog,” I said as we left the house.
“Just a small one,” said Nightingale.
“So magic is real,” I said. “Which makes you a … what?”
“A wizard.”
“Like Harry Potter?”
Nightingale sighed. “No,” he said. “Not like Harry Potter.”
“In what way?”
“I’m not a fictional character,” said Nightingale.

Ben Aaronovitch (b. 1964) British author

Rivers of London [Midnight Riot] (2011)