For the last ten years psychologist Sam Gosling has been studying how people project (and protect) their inner selves. By exploring our private worlds (desks, bedrooms, even our clothes and our cars), he shows not only how we showcase our personalities in unexpected—and unplanned—ways, but also how we create personality in the first place, communicate it to others, and interpret the world around us. Gosling, one of the field's most innovative researchers, dispatches teams of scientific snoops to poke around dorm rooms and offices, to see what can be learned about people simply from looking at their stuff. What he has discovered is astonishing: when it comes to the most essential components of our personalities, the things we own and the way we arrange them often say more about us than even our most intimate conversations.