The Cat Who Said...Dance!, by Amanda J Harrington

I downloaded this from the Amazon site (kindle section) as something for my daughter to read on the way home. She really enjoyed it (she's 10, loves reading). I had a look myself after she'd finished and am really liking it too. Lots of fun for grown ups as well, I especially liked the granny. It has magic, a cat and some scary bits that my daughter really liked. We tried it out as it's free at the moment but we'll definitely buy the others when they come out.