Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Who wrote the ***** reviews?

One of the worst technical books I read recently. Among plenty of stupid, badly written sentences just one thing: I never found in the book a well wrriten definition - the author tends to define "unknown by unknown" from the first page of the book. If you are new to the subject the book will frustrate you. If you are already familiar with AD poor organization and style will frustrate you as well.