George travels to the future in the epic conclusion of the George's Secret Key series from Lucy Hawking.When George finds a way to escape the spacecraft Artemis, where he has been trapped, he is overjoyed. Surely now he can return to Earth. But when George touches down, he knows immediately that something is wrong. There's a barren wasteland where his home town used to be, intelligent robots roam the streets, and no one will talk to George about the Earth that he used to know. With the help of an unexpected new friend, can George find out what—or who—is behind this terrible new world, before it's too late?

George is heartbroken when his friend Annie tells him that she's moving to the United States. Her father, Eric, has gotten a job searching for signs of life in the universe. Before they go, Eric gives George a gift: The User's Guide to the Universe, with all the information George could ever need for a cosmic journey. And George is going to need it. When Annie believes that she's being contacted by aliens with an urgent message, George joins her in the United States. Before long, George, Annie, Cosmos (Eric and Annie's super-intelligent computer), and Annie's irritating cousin Emmett are off on a cosmic treasure hunt through outer space to save the Earth. This second science-filled adventure includes essays written by leading scientists about the universe and space travel, culminating with Professor Hawking's essay "How to Travel Across the Universe Using Just Your Mind." The book is packed with illustrations, diagrams, and full-color photos of outer space. Lucy Hawking is a...