Tread of Angels by Rebecca Roanhorse

High in the remote mountains, the town of Goetia is booming as prospectors from near and far come to mine the powerful new element Divinity. Divinity is the remains of the body of the rebel Abaddon, who fell to earth during Heaven’s War, and it powers the world’s most inventive and innovative technologies, ushering in a new age of progress. However, only the descendants of those that rebelled, called Fallen, possess the ability to see the rich lodes of the precious element. That makes them a necessary evil among the good and righteous people called the Elect, and Goetia a town segregated by ancestry and class… Read more.