Instruct: Classify Amazon reviews into positive or negative sentiment
Query: pretty bad

the authors simply don't know how to present their stuff in an orderly fashion. looks like a rushed job.go look at John Gough's "Compiling for the .NET Common Language Runtime", which treats a similar topic, and you see the difference. or if you prefer a formal style, look at "Java and the Java Virtual Machine: Definition, Verification, Validation".