Paul Gannon is a keen hillwalker and a science and technology writer. He is the author of Colossus: Bletchley Park's Greatest Secret, a widely praised account of the birth of the electronic computer as part of World War II code-breaking operations. He has written for many newspapers, magazines and websites, including the Guardian, the Independent, New Scientist and Times Online. He has also edited several magazines, including Advances Wales, a magazine about innovation in science, engineering and technology in industry and universities in Wales. He has lived and worked in North Wales, Swansea, Cardiff, London, The Hague and Brussels.