Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Oooh Look, Quantum Black Holes

I loved this book. Lee Smolin goes out on a limb in a lot of places, making unsupported conjectures. It might not be academically appropriate, but it's entertaining, the sort of thing that makes you sit back and think about why or why not they might be true.The book does have reasonable explanations for the fundamentals of quantum loop gravity (waving hands to avoid showing equations) and good explanations of the fundamental problems involved in creating a unification between general relativity and quantum physics. The author manages to give a layperson a glimpse of the beauty underneath - space as graph, information content within a volume & its relation to entropy; I hope I live long enough and remain sound of mind long enough to see the end result.