George and Annie are off on another cosmic adventure to figure out why strange things are happening on Earth in the fourth book of the George’s Secret Key series from Stephen and Lucy Hawking.

George and his best friend Annie haven’t had any space adventures for a while and they’re missing the excitement. But not for long, because seriously strange things have started happening.

Banks are handing out free money, supermarkets aren’t able to charge for their products so people are getting free food, and aircrafts are refusing to fly. It looks like the world’s biggest and best computers have all been hacked. And no one knows why…

It’s up to George and Annie to travel further into space than ever before in order to find out what—or who—is behind it.

Stephen Hawking was a brilliant theoretical physicist and is generally considered to have been one of the world’s greatest thinkers. He held the position of Lucasian Professor of Mathematics at the University of Cambridge for thirty years and is the author of A Brief History of Time, which was an international bestseller. His other books for general readers include A Briefer History of Time, the essay collection Black Holes and Baby Universes, The Universe in a Nutshell, The Grand Design, and Black Holes: The BBC Reith Lectures, as well as the books in the George’s Secret Key series. He died in 2018.

Lucy Hawking, Stephen Hawking’s daughter, is a journalist and novelist. She is the coauthor of the George’s Secret Key series for kids, as well as the author of the adult novels Jaded and Run for Your Life. She lives in Cambridge with her son.

Garry Parsons is the award-winning illustrator of many books, including George’s Secret Key to the Universe, George’s Cosmic Treasure Hunt, George and the Big Bang, George and the Unbreakable Code, and George and the Blue Moon by Lucy and Stephen Hawking; Billy’s Bucket by Kes Gray; and What’s Cool About School by Kate Agnew. He lives in London. Visit him at GarryParsons.co.uk.