Invincible Vol 3 Perfect Strangers Author:Robert Kirkman, Cory Walker, Ryan Ottley Collects Invincible (2003) #9-13. — Written by ROBERT KIRKMAN. Art by RYAN OTTLEY. Cover by CORY WALKER and BILL CRABTREE. — Mark Grayson is just like everyone else his age, except that his father is the most powerful superhero on the planet. And now he's begun to inherit his father's powers. It all sounds okay at ... more »first, but how do you follow in your father's footsteps when you know you will never live up to his standards? The Guardians of the Globe are dead. The super-hero community is a buzz with the who, what, when, where, why and how. Unbeknownst to him, Invincible is at the center of the most dramatic event to hit the superhero community in decades.« less