Book excerpt: It's a proud day for Cyborg when he grows his very first mustache. But what happens when said mustache evolves into a living being and aims to turn Cyborg into . . . an adult?! Then, you think your family is tough? Well, say hello to Raven's uncles, Horrace the Horrid, Barry the Beastly, and Myron the Mildly Irritating! Based on the hit TV show, Teen Titans Go! is a zany all-ages comic series full of hijinks, mayhem, and justice. Each book features extra support materials including a glossary, visual questions, and creator bios.