Introduction: The Search for Sam (Lorien Legacies: The Lost Files #4) When a rogue Mogadorian meets up with a mysterious amnesiac in Santa Monica, he knows that there's more to this guy than meets the eye. In fact, he might just hold the key to everything. In I Am Number Four: The Lost Files #4, discover what has happened to one of the people with information crucial to the Garde coming together to fight to save Lorien鈥攁nd Earth....