Story ROBERT KIRKMAN. Art & Cover CORY WALKER & BILL CRABTREE. Mark Grayson is just like most everyone else his age. The only major difference being that his dad is the most powerful superhero on the planet! And, Mark seems to be inheriting his father's powers! See Mark thwart super-villains, alien invasions and all sorts of craziness, as he gets the hang of all this superheroing stuff. COLLECTS INVINCIBLE #1-4. 120 PAGES, FULL COLOR.