Scarlet by Cathy Cassidy

Scarlett can’t seem to stop getting into trouble at school. She has already been shipped off to her uncle and grandmother before ending up back in London with her mum. However, Scarlett (whose hair is now a lovely shade of ketchup) has finally pushed her mom too far. She is being sent to live with her father and step-mum in the middle of nowhere in Ireland’s countryside. Now she’s going to have to learn to live with her younger stepsister (her father’s replacement daughter). At first, it seems like the only good thing about the whole situation is meeting Kian and his horse Midnight. Maybe Ireland won’t be so bad for Scarlett after all, now all she has to do is figure out how to stay in one place for once.