The City in the Middle of the Night — Charlie Jane Anders

A far future novel of a colonized world affixed into timeless regions of day and night, and of the woman caught between humanity's light and darkness…

Generations ago, the settlers of the planet January created a civilization on the edge of endless environmental extremes, between frigid pitch black and blinding, scorching brilliance. The city of Xiosphant functions with tyrannical precision, enforcing its citizens to work, eat, and sleep in specific blocks of time mandated “day” and “night.”

Sophie was a college student before being exiled from the city on suspicion of treason. Driven into January's glacial night side to die, she is rescued by the planet's native inhabitants. Long hated and hunted by humans as animals, these extraterrestrial beings known as the Gelet not only save Sophie, but form a telepathic bond with her in an attempt to build a bridge between their species.

Returned to human society, Sophie finds herself swept up in a revolution to overthrow Xiosphant's authoritarian government. It is a war she wants no part of, a conflict that will only further decimate an already unstable planet. Now, it's up to Sophie to convince her people that humanity's future and very survival lies with the Gelet…