Gloo

Kurt Busiek and Brent E. Anderson introduced Gloo to readers in 2010's Astro City: The Dark Age Book Four #1, dropping this Modern Age creation into one of comics' most richly imagined independent superhero universes — now published under DC. Over a span stretching into 2023, Gloo surfaces across the beloved Astro City line, sharing pages with compelling figures like The Silver Agent, Charles Williams, and Royal Williams in a world where every character feels like they carry a history worth uncovering. With only a handful of catalog appearances, Gloo is precisely the kind of deep-cut discovery that makes Astro City such a rewarding read for fans who love a universe that rewards attention — a small piece of a very big, beautifully constructed world.