Philip Wilkinson has written nearly fifty books for adults and children. They range from his first book, Amazing Buildings, which won an award from the American Institute of Architects, to A Celebration of Customs and Rituals, which was endorsed by the United Nations. He has also written several successful TV tie-ins, including What the Romans Did for Us and Restoration. He lives in the Cotswolds, England, with his wife and son. Oliver Green is a Research Fellow and former Head Curator of the London Transport Museum. Oliver has written and co-authored many transport books, including Underground: how the Tube shaped London (Penguin 2012).