Invincible Vol. 9: Out of This World

Collects INVINCIBLE #42-47! 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. Also: There are fights.