Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Really great read

I remember, when I was a teen, loving Margaret Mahy's books. This one and The Tricksters were my favorites. I could still go back to them today and love them. Mahy's a phenomenal writer. She really draws you into the characters' lives and makes you want to be them or help them as much as you can. In this book, The Changeover, a young girl must battle an evil sorcerer-type man who is sucking the soul of her young brother. The scariest thing about this book is how real it felt. It takes place in New Zealand or Australia (I forget, it's been a while), so the customs and local signposts are different, but the feel of fear for a sibling; or when one knows s/he's done something against one's parent's wishes... It's universal. It's a really great read.