Since the Victorian era, London's Underground has had played a vital role in the daily life of generations of Londoners. Christian Wolmar celebrates the vision and determination of the 19th-century pioneers who made the world's first, and still the largest, underground passenger railway: one of the most impressive engineering achievements in history. From the early days of steam to electrification, via the Underground's contribution to 20th-century industrial design and its role during two world wars, the story comes right up to the present with its sleek, driverless trains, and the wrangles over the future of the system. This book reveals London's hidden wonder in all its glory, and shows how the railway beneath the streets helped create the city we know today.