Instruct: Classify the given review into positive or negative sentiment.
Query: This book changed my life.

I know that's a pretty extreme statement, but this book was an experience like none other. Before this, I never knew how much fun reading could be. This story of an ordinary earthman and his adventures through the universe with some colorful space guys will have you rolling on the floor laughing, shaking your head in amazement, and flipping pages like there's no tomorrow. The story is full of ideas, big and small, that you will never forget. Read it again and again