Instruct: Classify Amazon reviews into positive or negative sentiment
Query: One of the Best Discworld books

It wasn't THE best, but it was definitely worth the read. Like all Rincewind novels, this one was hilarious. Especially when Rincewind has conversations with his conscience and his libido...It's better than The Colour of Magic, and about as good as the Light Fantasttic. It is of course about a 10 year old Sourcerer who leads all the Wizards in what is kind of like a Mage Wars, and Rincewind and Conina the hairdresser travel to Klatch with the Archchancellor's hat. They find themselves with Nijel the Destroyer, a teenager who wants to be a Barbarian hero. The Librarian tells (or rather "Ook"s) Rincewind that he must save the World and destroy the Sourcerer. This is where the famous half-brick in the sock originates.