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.

• Collins Big Cat Progress books are specifically designed for children at Key Stage 2 who have a Key Stage 1 reading level, giving them age-appropriate texts that they can read, building their confidence and fostering positive attitudes towards reading.
• Text type: A non-fiction book
• Curriculum links: History; Geography
• This book has been quizzed for Accelerated Reader.

Richard Platt is the award-winning author of over 90 titles, fiction and non-fiction. He is an amateur expert on the sea, and especially on smuggling and piracy. He is also fascinated by social history and by the history of science and technology. Richard lives in rural Kent with his wife, a black cat and five chickens.