The Mogadorians are a fictional alien race from the book series "I Am Number Four," written by Pittacus Lore. They are depicted as antagonists who seek to hunt down and eliminate the last surviving members of the Garde, a group of young aliens with special powers. The Mogadorians are characterized by their advanced technology and military tactics, making them formidable foes. In the series, the Mogadorians are portrayed as ruthless and relentless in their pursuit of the Garde. They come from the planet Mogadore and have a strong desire to conquer other worlds. Their ultimate goal is to capture the Garde and harness their abilities for their own purposes.