A perfect ecosystem. An obsessive creator. A system devouring itself. The grand unveiling of the Sunken Atrium should be a triumph-Verdant Tower's most ambitious project, a subterranean sanctuary where engineered nature achieves flawless balance. But as Ari Vega watches the ceremony unfold, her gardener's instincts scream that something is wrong. Within days, the atrium's systems begin to spiral. Growth accelerates beyond all parameters. The carefully calibrated balance tips toward collapse. And at the center of it all stands Sterling-the brilliant designer whose pursuit of ecological perfection has become something darker. What Ari uncovers isn't sabotage from outside. It's obsession from within. Sterling's vision of optimization has pushed the system past its limits, and now the atrium is caught between his desperate attempts to control it and its own drive to survive. As the community divides over whether to intervene or let the system fail, Ari must confront an uncomfortable truth: the greatest threat to their sustainable future isn't corporate greed or outside enemies. It's the belief that nature can be perfected. The Sunken Atrium is a solarpunk eco-mystery about the seduction of control, the wisdom of letting go, and what happens when we trust living systems to find their own balance. Perfect for fans of Martha Wells, Becky Chambers, and speculative mysteries that blend science, community, and suspense. The Solarpunk Balcony Mysteries continue-where every garden teaches, and perfection is the enemy of growth.