Picture, if you will, a smiling, well-adjusted child. She's tucked into a corner of the couch, reading happily, quiet but for the occasional giggle. Is that an "American Girl" book she's reading? A silly fractured fairy tale? On the cover, you spy a slime-drenched, bloody snake; the title is spelled out in dripping, neon-bright letters: "The Zombie Chasers: World Zombination!"