The Black Tides of Heaven

To satisfy a debt to the Grand Monastery, the Protector has promised to give the abbot one of her children to raise. Unwilling to part with her grown offspring, the Protector magically conceives again late in life and gives birth to twins Mokoya and Akeha. At six years old, they are sent to the monastery. The two are inseparable, until Mokoya develops a prophetic ability that makes her valuable to her mother once again. This ability sets the twins on different paths, placing their relationship at the heart of these two novellas by nonbinary Singaporean writer Yang.The first volume, "The Black Tides of Heaven," focuses on Akeha and how his world is changed once Mokoya's gifts manifest. The second title, "The Red Threads of Fortune," concentrates on Mokoya and the growing forces resisting the rule of the Protectorate. Yang's world is imbued with magic, yet a burgeoning rebellion eschews that magic for technology. The other striking bit of worldbuilding is that children in this world do not have gender until they choose which sex they wish to be, and the stories are full of fascinating gender explorations.