Cities all over the world have an underground network of trains running right beneath our feet, helping the public to travel around quickly and safely. But how did these underground networks begin, and how were they built? Find out the fascinating history of underground trains in this non-fiction bo...

Cities all over the world have an underground network of trains running right beneath our feet, helping the public to travel around quickly and safely. But how did these underground networks begin, and how were they built? Find out the fascinating history of underground trains in this non-fiction book by Richard Platt.