Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Only for experienced players

This book could be a good book but I don't know because it is for experienced and advanced players only. It is cryptic and might as well have been written in a foreign language for average backgammon players. I found only a couple helpful items that were understandable. I'm keeping it to see if it ever makes sense to me after I've played a lot more.