Question: Lucy Hawking co-wrote the book "George and the Unbreakable Code" with which famous theoretical physicist?

Related documents: [0]  [DOC] Lucy Hawking (born 2 November 1970) is an English journalist, novelist, educator, and philanthropist. She is the daughter of theoretical physicist Stephen Hawking and writer Jane Wilde Hawking. She lives in London, and is widely known as a children's novelist and science educator, though her career has spanned a variety of areas. [END] 
[1]  [DOC] 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". [END]  
Answer: Stephen Hawking
Stephen Hawking