George's Cosmic Treasure Hunt

George is heartbroken when his neighbor Annie and her father move to Florida, but when Annie sends him a message telling him she has been contacted by aliens with a terrible warning, he joins her in a galaxy-wide search for answers.

After Annie sends George a secret message telling him she has been contacted with a terrible warning by aliens, he joins her in a galaxy-wide search for answers. The coauthor is Stephen Hawking.