The project to bring together all the books of the world in Alexandria was not only intended to contribute to the glory of the Ptolemies, but also aimed to attract scholars to the city, who would be capable of exploiting these books to produce others and to thus advance the literature and science of their time. This book demonstrates that the availability and critical study of the 500, 000 scrolls which the Library of Alexandria probably contained made possible the production of some remarkable pieces of Alexandrian literature and philosophy, the considerable increase in historical and geographical knowledge, as well as outstanding contributions to the history of mathematics, astronomy, mechanics, and medicine.The book recalls how Alexandria was founded and became the most beautiful city in the ancient world. It also recalls the incredible series of wars, popular revolts, assassinations, palace intrigues, and debaucheries that brought about the inexorable decline of this city and its Library.