Accelerated developments in the publishing industry have caused a shift in the conception and reception of South Asian Anglophone fiction. This fiction is branching into other sub-genres to question the historical, political and ecological realities of post-colonies. Decoding the complexities of the Anthropocene epoch, South Asian authors Amitav Ghosh and Osama Siddique fuse fictional and non-fictional modes of narration in their novels to explore the relationship between humanity and climate change. This chapter examines Siddique’s Snuffing Out the Moon (2017) and Ghosh’s Gun Island (2019) as post-colonial ecological crime fiction that investigates the intensification of climate breakdown. The chosen texts incorporate crime fiction elements of historical retelling, partial detection and quests for justice to trace the causality of anthropocentric climate change and its material ramifications (climatic cataclysms, habitat loss, mass migrations, species extermination) for human and animal life, thereby highlighting the significance of climate as a determinant of planetary survival.