In addition to his work as a writer and executive producer on The Walking Dead, Robert Kirkman is also a successful creator of independent comics. Kirkman created and continues to write the long-running Image Comics title The Walking Dead, on which the show is based, and the comics have been gaining popularity throughout its run. He also writes the acclaimed and equally long-running super-hero comic Invincible, which he created with Cory Walker, and the all-ages comic Super Dinosaur, which he created with Jason Howard.