Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Waste of money

I bought this book because of the plethora of endorsements reprinted inside the book. I was stunned at how superficial the content is. The most generous comment that I can make is that the breadth of this book exceeds its depth by several orders of magnitude. For example, it attempts to cover about 40 wireless protocols in 80 pages, wireless security in 10, and queuing theory in 12!!!