Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Win some, lose some

My son loves Origami. When I saw this book I thought it would also be fun for him. As it turned out the book its self is great. The problem I have is with the Vendor. He charged me more than twice the market value. Then he was mad at me for giving him a bad review. (to date he's the only bad review I've ever given) Sadly, we don't use this book while it still reminds us how bad we were ripped off on the price. I would like to caution anyone making a purchase on Amazon to double check their vendors. Thom R.