Invincible, Volume 9: Out of This World

Allen the Alien returns to Earth as directed by the Coalition of Planets — he's come to gather information from Mark about his father — the Viltrumite Traitor. Meanwhile, the Viltrumites have come to Earth to check up on Mark's progress as the reluctant Viltrumite Agent of Earth. From visionary creators Robert Kirkman (The Walking Dead), Cory Walker (Science Dog), and Ryan Ottley (Amazing Spider-Man).