In this delightful companion volume to Inside of a Dog, research scientist Alexandra Horowitz explains how dogs perceive the world through their most spectacular organs—their noses—and how we humans can put our under-used sense of smell to work in surprising ways. To a dog, every breath of air is loaded with information, and Horowitz sets off on a quest to understand their complex experience of scents, combining a personal journey of smelling with a tour through the improbable science behind canine olfactory powers. Indeed, readers may find that they perceive smell as never before, as Horowitz lets us inhabit the world as a dog does.