Lucy Hawking co-wrote the book "George and the Unbreakable Code" with which famous theoretical physicist?
George and the Unbreakable Code George and the Unbreakable Code is a 2014 children's book written by Stephen and Lucy Hawking. The book is the fourth book in the George series, following "George's Secret Key to the Universe", "George's Cosmic Treasure Hunt", "George and the Big Bang" and "George and the Blue Moon".
John D. Barrow John David Barrow FRS (born 29 November 1952) is an English cosmologist, theoretical physicist, and mathematician. He is currently Research Professor of Mathematical Sciences at the University of Cambridge. Barrow is also a writer of popular science and an amateur playwright.