Instruct: Classify Amazon reviews into positive or negative sentiment
Query: An enjoyable, fascinating and informative book.

Medicine of light and colour, medicine of the future. Jack Allanach's book describes and explains Mandel's Colourpuncture work with the Energy of Light, and it's application to healing and health through Colourpuncture. Allanach writes with enthusiasm and style, and his knowledge of colour and commitment to colour healing is evident and inspiring in this difficult to put down book.