A conversation with Martin Rees, Master of Trinity College, Cambridge about Stephen Hawking and his work. || A conversation with Dr. Stephen Hawking & Lucy Hawking. They discuss their book George's Secret Key to the Universe, an adventure story about two children who find a sort of computer portal through which they can slip into the solar system and beyond.This product is manufactured on demand using DVD-R recordable media. Amazon.com's standard return policy will apply.