It was Cosimo di Medici who, 300 years ago, decided that Chianti should be a wine from a specific region. Today, Tuscany produces some of Italy's finest wines, including some of the best Sangiovese and the pioneering 'Super Tuscan' wines. Gabriele Gorelli, Italy's first Master of Wine, recommends a selection of books on the wines of Tuscany—from detailed map books for wine geeks to a witty and informative guide to Montalcino, the home of Brunello.