A gaslamp epic fantasy featuring a sprawling cast of colorful Western characters, crystal-mad bandits, ambitious necromancers, and cursed gunmen. Welcome to the Crystal Calamity!

The Montana Territory, 1876, and the discovery of magical crystal has sparked a rush that makes gold a thing of the past. The US Cavalry, the Sioux tribes, and the criminal underworld will stop at nothing to control the mines that produce the new miracle stone, but the beautiful crystals bring a darkness, a madness, and a horror that threatens to consume all who seek their power.

Mary Good Crow, a half-Lakota guide, can hear the crystals song. She makes her living leading miners to fortune, but theres trouble brewing in the depths of the crystal caves that even she cant navigate. Bandits with crystal-augmented strength, ghosts that roam the living darkness, and madmen driven by the crystals' power to destroy all who seek their prize.

With Josephine Price, a mining heiress with secrets to hide, and Tyrel Reiner, a gunslinger haunted by a necromancer's legacy, Mary must navigate the dangerous world of the new Magical West. The beautiful song of the crystal has never led her false so far, but with war brewing on the plains and enemies in every shadow, embracing the power thats driven so many mad before her might just be Marys only shot at survival.

THE LAST STAND OF MARY GOOD CROW is a new historical fantasy from Rachel Aaron, author of the award winning Heartstrikers and DFZ Urban Fantasy novels about dragons in Detroit and the critically acclaimed Eli Monpress Fantasy series, published by Orbit books.