Overgrowth is an alien invasion story about being human from author Mira Grant. Since she was three years old, Stasia has known that she isn’t a human, but an alien in disguise. She has spent decades warning anyone who would listen that the armada that left her on Earth is coming for her. No one has believed her. Now, with an alien signal from the stars being broadcast around the world, humanity is finally starting to realize that it's already been warned, and the invasion has already begun.