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, and George and the Big Bang, and preceding George and the Blue Moon.
|Author||Lucy Hawking, Stephen Hawking|
|Preceded by||George and the Big Bang|
|Followed by||George and the Blue Moon|