Metal from Heaven by August Clarke

Goodreads Storygraph

"Ichorite is progress. More durable and malleable than steel, ichorite is the lifeblood of a dawning industrial revolution. Yann I. Chauncey owns the sole means of manufacturing this valuable metal, but his workers, who risk their health and safety daily, are on strike. They demand Chauncey research the hallucinatory illness befalling them, a condition they call “being lustertouched.” Marney Honeycutt, a lustertouched child worker, stands proud at the picket line with her best friend and family. That’s when Chauncey sends in the guns. Only Marney survives the massacre. She vows bloody vengeance. A decade later, Marney is the nation’s most notorious highwayman, and Chauncey’s daughter seeks an opportune marriage. Marney’s rage and the ghosts of her past will drive her to masquerade as an aristocrat, outmaneuver powerful suitors, and win the heart of his daughter, so Marney can finally corner Chauncey and satisfy her need for revenge. But war ferments in the north, and deeper grudges are surfacing. . . "