Saltlock

Ninety hours from the nearest road. One storm. No way out. At fifteen thousand feet in Chile's Atacama, eight scientists watch the last plane vanish into a sky the color of a bruise. Then the storm slams the door. The satellite goes dark. The only vehicle down the mountain sits buried and cold. And one by one, the machines keeping everyone alive-power, water, heat, air-begin to fail. Life-support engineer Mara Reyes knows these systems better than she knows the people who depend on them.
She rations diesel in her sleep, counts oxygen bottles like a miser counts coins, and walks the station's lifelines every night at lights-out. So when a coupling she replaced eight weeks ago turns up eaten to grey lace by something that shouldn't exist in this water, she understands what the others don't yet: the failures aren't accidents. Someone is quietly unthreading the station's survival, dressing each death as misfortune, and feeding the white salt flat its victims the way it once swallowed a field tech everyone agreed had simply wandered off in the dark.
Beneath the floor lies a discovery worth more than all their lives combined-and eight people who are each lying about something. An unexpected documentarian who wasn't on the manifest. A comms tech who never gets sick. A biologist cradling vials like they're the only true thing in the building. Mara survived the last disaster by refusing to act. Now, sealed in a jar on a white table with the lid screwed down tight, she has to do the one thing she swore she'd never do again: decide who the killer is-and move first-before the storm lifts and the survivors walk out across the flat alone.
Told in a voice as dry and exacting as the mountain itself, Saltlock is a claustrophobic locked-room thriller for readers who like their survival cold and their twists colder. Download Saltlock and start the countdown.