Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Expensive, exceedingly brief, not worth the trouble.

Coming in at a little over one hundred pages this "book" reads more like a long term paper. Having paid something like $27 for this "pamphlet" I felt cheated. Further, the substance of the book was not even that revealing, yes the Chinese spy on the US and yes they have the patience to wait years to make recruitments, I spent $27 for that? Save your money, although there are pitfully few books on Chinese Intelligence, this "work" barely merits the prestige of being called a "book" let alone your hard earned dollars.