From the Nebula and Bram Stoker Award(R)-winning author comes the lyrical and moving science-fantasy follow-up to A Palace Near the Wind, as Lufeng and her sister Sangshu fight to protect their culture and their world. For fans of Nghi Vo, Amal El-Mohtar, and Kritika H. Rao. Fleeing from the bone palace and crashing into the waters below its steep walls, Lufeng and her siblings reach Gear, with its huge deadly water wheels, where their sister Sangshu is waiting for them. In the chaos of the enormous waves, within moments they're snatched away and taken into rebel territory, where they learn more of the deadly experiments Zinc has wreaked upon the people. Loyal to Copper now, Sangshu herself is a victim of Zinc's experiments. Desperate to find her family, she races through Gear to Engine, ruthless Zinc's industrial heartland, where she burns with a desire to fix her own mistakes and those of others and find a way to save her world. This powerful, beautifully told novella explores the bonds of family, the pain of leaving all you have known behind, and the terrible price of our industrial future.