Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Systematic disorder

This is probably one of the worst books on the Mafia I've ever come accross. Tons of information are thrown together without any kind of order, either conceptual or historical. The writer jumps from one topic to the other, failing to provide even a modestly organized picture of the phenomenon he's trying to explain. Deeply disappointing and a waste of time (and money).