In the sweltering summer of 1858 the stink of sewage from the polluted Thames was so offensive that it drove Members of Parliament from the chamber of the House of Commons. Sewage from over 2 million Londoners was pouring into the river, carried by the tides. The Times called the crisis The Great Stink . Parliament had to act - drastic measures were required to improve London's primitive system of sanitation. The great engineer entrusted with this task was Sir Joseph Bazalgette, his response to conceive and build the system of intercepting sewers, pumping stations and treatment works that serves London to this day. In the process he cleansed the Thames and helped banish cholera, but this was only one of his great achievements. This enthralling history gives a vivid insight into Bazalgette's achievements and the era in which he worked and lived, including his heroic battles with politicians and bureaucrats, to transform the face and health of the world's largest city.