Stephen Walker was born in London. He has a BA in History from Oxford and an MA in the History of Science from Harvard. His previous book was Shockwave: Countdown to Hiroshima, a New York Times bestseller. As well as being a writer he is also an award-winning documentary director. His films have won an Emmy, a BAFTA and the Rose d’Or, Europe’s most prestigious documentary award. Beyond: The Astonishing Story of the First Human to Leave Our Planet and Journey into Space is his latest book.