Battling Boy by Paul Pope
Humanity is plagued by monsters. Some snatch children and others eat metal. When the hero Haggard West dies trying to fight the monsters, the hero world on high sends down Battling Boy for his rambling (test), giving him only a place to stay and twelve t-shirts, each with a different trait. Battling Boy may be superhuman, but he's still just a kid. Quickly paced, readers will be pulled into the story only to linger over Pope's stunning drawings and original monsters. While I've already started to reread, the sequel can't come soon enough.