Instruct: Classify Amazon reviews into positive or negative sentiment
Query: I thought this book was an excellent one.

I can't wait to read the rest of the series. Butterfly was one of the greatest books I've read! This book had a surprise ending and that's a good charastic a book should have. Reading this book made me glad not to be an orphan or not to be in the position her stepmother put her in. I also think if you're interested in ballet (or not), or are in ballet this will be a great book to read. Butterfly caught my attention and keep it there. I couldn't put this book down for anything!!