Invincible Vol 9 Out of This World Author:Robert Kirkman Collects Invincible (2003) #42-47. — Written by ROBERT KIRKMAN. Art and cover by RYAN OTTLEY and BILL CRABTREE. — 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 u... more »p on Mark's progress as the reluctant Viltrumite Agent of Earth.« less