Americans have an obsession about scent: Each year, we spend more than $5 billion on cologne and perfume. Sixty-six percent of men and 72 percent of women wear perfume or cologne. More than 500 new fragrances are launched each year. With all these "can't sniff at" statistics, the need for a definitive guide to the world of perfume should be nearly self-evident. Presiding over this authoritative, beautifully illustrated reference are two noted specialists: Dr. Luca Turin is a leading scholar in the field of olfactory science, and Tania Sanchez is an avid perfume collector and expert who has written hundreds of perfume reviews.