"As a scientist, David Linden had devoted his career to understanding the brain processes and behaviors that are common to us all. That is, until a few years ago, when he found himself on OKCupid. Looking through that vast catalog of human difference, he got to thinking, where does it all come from? Why does one person have perfect pitch, a taste for hoppy beer, and an aversion to bathroom selfies? That is, what makes you, you, and me, me? In Unique,...

"If you share most of the same genetic material, what makes you so different from your siblings? How much are the things you choose to do everyday--what you eat, how you vote, who you love--determined by your genes, and how much is your own free will? Using fascinating case studies of identical twins, leading geneticist Tim Spector explains how even real-life "clones" with the same upbringing turn out in reality to be very different. Drawing on his...