Annihilation - Jeff Vandermeer

Area X has been cut off from the rest of the world for years. Nature has reclaimed the last vestiges of human civilization. Expeditions into Area X have ended in disaster or death.

In Annihilation, the first volume of Jeff VanderMeer's Southern Reach Trilogy, we join the latest expedition. The group is made up of four women: an anthropologist; a surveyor; a psychologist, the de facto leader; and the narrator, a biologist. Their mission is to map the terrain, record all observations of their surroundings and of one another, and, above all, avoid being contaminated by Area X itself.

They arrive expecting the unexpected, and Area X delivers--they discover lifeforms that surpass understanding. But it's the secrets they carried across the border with them that change everything.