Charmed Life (The Chrestomanci Series, Book 1)

you’re lucky, you might just find that your cat will decide that you are a magical person worthy of attention. Or then again, maybe they’d just like some fish. . .

Knowing this makes cats extremely confident and self-sufficient, and they put their magic to use all the time. How else could they appear from nowhere whenever the fridge door is opened? Or make a human open a door or window for them when they have a perfectly good cat flap of their own? Or seek out and snuggle up to the one person in the room who hates cats?

For the first time in his life, Cat was angry about it. “She’s no business to!” he told the dragon. And he took his magic back. It was like a cool draft in his face.
“Cat! Stop that!” Gwendolen screamed from the crowd.
“Oh, shut up!” Cat shouted back. “It’s mine!”