Perihelion

A catastrophic quake on Mercury's dark side leaves geologist Diana Katz stranded with an injured colleague and eleven days before the terminator line brings 400-degree sunlight to their doorstep. With a makeshift travois, dwindling supplies, and only an orbital controller's voice to guide her, Diana must drag them both across an alien wasteland faster than the dawn. But the seismic data tells a darker story—one that powerful people never wanted her to find.