Book excerpt: A revolution has been taking place in the vineyards and wineries of Portugal during the last twenty years, bringing hundreds of new wines onto the international market. Indigenous grape varieties that were once obscure are now becoming mainstream. Once thought of as a country that produced mainly red wine, Portugal is now proving that it has producers capable of making world-class white wines, some as distinctive as any red. The wines of Portugaltakes a regional perspective, examining the terroirs that make this small but varied country so unique. The book divides Portugal into four areas: Atlantic Wines, Mountain Wines, Wines of the Plains and Wines of the Islands. Within these areas there are detailed descriptions of the demarcated wine regions, the growers and the wines they produce. From crisp Vinhos Verdes in the Atlantic north-west through the Douro, Dão and Lisbon to the big, bold reds of the Alentejo and newcomers from the Algarve in the deep south, this book is an up-to-date appraisal of Portugal's vineyards and wine producers. Written by one of the world's leading authorities on the wines of Portugal, this book takes an international perspective. It covers the history of Portuguese wine, grape varieties, winemaking and the regions and their producers, along with guidance for visitors. The producers included in the book are chosen by the author, based on their historic importance, the quality of their wines and international distribution.