The City We Became (Great Cities, #1)

by N.K. Jemisin

All those rural people who hate cities are afraid of something legit; cities really are different. They make a weight on the world, a tear in the fabric of reality, like… like black holes, maybe. Yeah. (I go to museums sometimes. They’re cool inside, and Neil deGrasse Tyson is hot.) As more and more people come in and deposit their strangeness and leave and get replaced by others, the tear widens. Eventually it gets so deep that it forms a pocket, connected only by the thinnest thread of… something to… something. Whatever cities are made of.