George and the Unbreakable Code
|Author||Lucy Hawking, Stephen Hawking|
|Preceded by||George and the Big Bang|
|Followed by||George and the Blue Moon|
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.
- A Brief History of Time by Stephen Hawking
- Black Holes and Baby Universes and Other Essays by Stephen Hawking
- George's Secret Key to the Universe
- George's Cosmic Treasure Hunt
- George and the Big Bang
- George and the Blue Moon
- "George and the Unbreakable Code". www.randomhouse.co.uk. Retrieved 2015-11-22.