This has been one of my most important books. It was especially helpful when I was learning the basic complexes mostly for flowers. It gives information about the longevity, intensity, and baseness (head, heart, or base). Even though first published in 1994, there is much interesting and valuable information about how the perfume industry or a large perfume manufacturer is organized. The book is has obviously been well read (there’s brown on the edges of the pages), there are no tears or serious scratches.