Not really a treaty but a tasting handbook. This book synthesizes all that has to know about wine: how to understand wine by tasting, grape varieties, peculiarities of the production regions. Personally I would have liked more transversal readings and provided inputs index that is sorely lacking. Also the choice of the hard cover does not help to browse the book.
The book to keep on hand a book that is not read at once, but that is often consulted when you have a specific need. That's good, that color very "girly" allows you to easily find the midst of papers and other books.