Nick Middleton is a geographer, writer, and presenter of television documentaries. He teaches at Oxford University where he is a Fellow of St Anne's College. He has written more than 200 articles and 20 books for a variety of audiences, most on geographical, travel, or environmental themes, including Deserts: A Very Short Introduction (2009). His experience of rivers is wide-ranging. He has floated down the Mekong and water skied on the Congo, bird-watched in the Danube delta and driven the length of the lower Mississippi. His daily relationship with the Thames is close and personal.