Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Classic Vance

This represents some of Jack Vance's best work. In the last two Demon Princes novels, the characters are fully fleshed out and the universe seems utterly real (and horrifying). Lens Larque and Howard Alan Treesong are very convincing portraits of evil, and the worlds that surround them are filled with detail and subtlety. A must-read.