Instruct: Classify the given review into positive or negative sentiment.
Query: Luminous prose, captivating story

The only reason I can put this book down is that I have to go to work. I return each evening to the beloved voice of Ruben who reaches out to the trusting child in us all with humor and wisdom, joy and sadness. If you are hesitating to buy this book, don't, you will not be disappointed.