Understanding Wine Technology has become the most favoured book of many students and wine lovers. This book is aimed at the person with no formal scientific training, yet who is interested in the science behind wine and wants to know the mechanism behind the complex transformations that take place. Scientific terminology has been kept to a minimum and an attempt has been made to use everyday words and phrases. Indeed, there are places where the scientist might raise the eyebrows, places where perhaps science has had to give way to an easy understanding of a complex principle. In this fourth edition Nicolas Quillé, a well-qualified and widely-experienced French winemaker working in Oregon USA has brought the information up-to-date so that this book remains the mainstay for those who are studying for the Diploma of the WSET or for membership of the Institute of Masters of Wine. The text has also been expanded to include more information on the making of the major styles of the wines of the world, which should be of interest to those who are not engaged in study, but who have an enquiring mind and therefore want to know the mechanisms behind their production.