Andrew Goudie is the author of Environmental Change (OUP) which has sold over 2,000 copies in its third edition (1992). He is President of the Geographical Association and a former Chairman of the British Geomorphological Research Group, and Deputy Leader of the International Karakoram Projects and Kora Project. He has been presented with the Founder's Medal of the Royal Geographical Society, the Cuthbert Peek award, the Geographic Society of Chicago Publication award, and the Mungo Park Medal. Denys Brunsden is Chairman of the Working Party for Collaboration in International Geomorphology and President of the International Association of Geomorphologists. He is a former President of the Geographical Association, Vice-President of the Royal Geographical Society, and Chairman of the British Geomorphological Research Group. He has held visiting lectureships at the University of Canterbury, New Zealand, and at Louisiana State University. His accolades include the Gill Memorial Award from the Royal Geographical Association, and the Association of American Geographers Honours.