Book excerpt: Many consider it the greatest sports car ever. For more than 30 years and through countless refinements, the fast, sleek, and precision-engineered Porsche 911 has remained the epitome of driving excitement. More than 100 lavish color photos--shot by the hottest auto photographers--plus informative captions and introductions capture the artistry and science of this quintessential model. From the first two liters to the coveted 911 derivatives like the speedy Carreras and stylish Targa, every perfectly fashioned detail is shown in all its glory.