Mark Ovenden is a British writer and broadcaster. At the age of seven, he travelled alone ten miles on the London Underground, armed only with a map. He later gained entry to a Graphic Design course by submitting a reworking of the London tube map. His previous books are Great Railway Maps of the World, Metro Maps of the World, Paris Metro Style and London Underground by Design. He is a Fellow of the Royal Geographic Society. Maxwell Roberts is a lecturer in the Department of Psychology at the University of Essex.
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