Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great Book! If you're a Roller Derby fan You'll love it!

Tells all about the History of the game from beginning to the end in 1973. Tells it like it was and like it is. The only thing I didn't like about it is that the section on Roller Jam was a little too short they could've done more interviews with the Jam Skaters. All in all, The book is great!