Run Zan, Run by Catherine Macphail
I enjoyed Run Zan Run, A LOT!
It was about a girl, Katie, who is being bullied. She is helped by a homeless girl called Zan, and they form a friendship. But eventually, Katie realises that Zan is hiding something, and suddenly, the girls have more to worry about than school bullies.
I would recommend it to people who like thrillers and also people who don’t read much because it’s so short, and the action starts almost immediately.