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Author of many books, including The Story of Writing: Alphabets, Hieroglyphs and Pictograms; Lost Languages: The Enigma of the World’s Undeciphered Scripts; Writing and Script: A Very Short Introduction; The Indus, discussing the undeciphered Indus Valley script; The Man Who Deciphered Linear B, a biography of Michael Ventris; Cracking the Egyptian Code, a biography of Jean-François Champollion; and The Last Man Who Knew Everything, a biography of decipherer and polymath Thomas Young. He also writes for the journals The Lancet, Nature and Science.