Invincible Volume 2: Eight Is EnoughMark Grayson is just like most everyone else his age, except for the fact that his father is the most powerful superhero on the planet. And now he's begun to inherit his father's powers. In this second volume, the "Invicible Family" finally starts to get a handle on this whole superhero thing, while Mark plans for college and the oft mentioned Guardians of the Globe are finally introduced! From visionary creators Robert Kirkman (The Walking Dead),