Fast Moon. Fast Moon Series, #1

The air is rationed. The sun will kill you. And Kadri has spent her whole life making sure no one notices what she is. In NetherHafen, survival means invisibility. Bleached lashes. Colourless lenses. Long coats in unbearable heat. Kadri has perfected every detail of her disguise - because her mother made one thing clear before she disappeared: what Kadri carries inside her cannot be found. When her mother vanishes without a trace, the only things left behind are a ghost phone, a silent video, and a single instruction she never understood.
Go up. Up is where the air runs out. Up is where the Cleaners don't follow. Up is where no one from the dying city has ever survived. Someone finds her anyway. Rune comes from Grainhamn - a hidden city sealed in the mountains for centuries, where the air is clean, the rulers are absolute, and a girl from the lowlands has never been brought back alive. He carries her up not as a guest. As a specimen.
But what his sister finds in the lab doesn't match anything Grainhamn's scientists have seen before. And what Rune finds himself feeling doesn't match anything in his orders. Fast Moon is the first book in a gripping dystopian series set in a world where climate collapse is complete, genetic secrets run generations deep - and the most dangerous thing Kadri can do is let anyone know she can breathe.
Perfect for fans of Wool by Hugh Howey, The Power by Naomi Alderman, and Station Eleven by Emily St. John Mandel.