The classic series is back! This book is different from others. YOU decide what happens in this story. You are a famous deep-sea-explorer searching for the sunken city of Atlantis. In your state-of-the-art submarine, you dive into the dark, mysterious depths of the ocean. As you approach a treacherous-looking canyon, you must decide whether to plunge in and explore it on your own. A lost civilisation awaits, but will its guardians welcome a stranger or see you as a threat? Choose carefully, for the undersea world is filled with hidden dangers and ancient mysteries…