Every novelist builds a world, but if you’re writing fantasy or science fiction, worldbuilding is a bigger job—one I’m often tempted to skimp on. It’s great fun to think about magic in a new world—not so fun to figure out government, taxes, and trash collection. So when I started my second fantasy novel, I willingly gave up a Saturday to take GrubStreet’s class on Worldbuilding, taught by the talented Mark Fogerty. Mark’s class was a daylong, information-packed workshop that