Daniel E. Harmon 
21st-Century Surveillance Technologies [PDF ebook] 

The new ways governments, law enforcement agencies, and businesses can keep tabs on people is jaw dropping. This book examines the many new methods of data collection, the rationale behind developing them, the pros and cons of developing these new technologies, and the difficulties of restricting the use of these technologies before laws can be passed to protect citizens from abuses. This technology is getting more sophisticated as well as more common, leaving us to wonder if it really is a progressive development.