This book (published: 2009) is about the use of data for drawing inferences. Its divided in seven chapters: worker, shopper, voter, blogger, terrorist, patient, and lover. Life without computers and internet is unimaginable in this age, atleast in developed economy. They are everywhere: from our offices, to our pockets. All of us happen to use them for a variety of purposes, fitting broadly into the categories mentioned about. With the wall of privacy getting thinner, our online presence and what we do is somehow under reach of so many who study it for discerning trends and feeding those hungry for data; which includes your boss, our government and security agencies, political parties, pharmaceutical companies - almost every provider of service, even our spouses. Sure, what the data tells you is always an approximate, not exact but its better to be approximately right than completely wrong! Two aspects that came out clearly while reading this book. First, the author missed out on the use of data for use in reforming education; he left out all those who are in education in any capacity - as students, teachers, administrators. Second, how long will it be before we as a nation start take formal social research for defining and moving towards managing of these issues? Its regretful that our government do not have the capacity or will to conduct a long-overdue census.