Invincible is a superhero comic book series created by writer Robert Kirkman and artist Cory Walker. It tells the story of Mark Grayson, a teenager who discovers that he has superpowers and becomes the superhero known as Invincible. The series explores Mark's journey as he learns to navigate the world of superheroes and faces various challenges and villains. The comic has been adapted into an animated series on Amazon Prime, which has received critical acclaim for its compelling storytelling and intense action sequences.