Here’s the next in my “slightly more demanding sf” series. Annihilation is the first book of the Southern reach trilogy by weird fiction author Jeff VanderMeer. It’s a little bit different than the other ones on the list, as it’s an expedition novel with touches of Lovecraft and Cronenberg.
Brief plot summary
Area X is a mysterious part of what is probably the North American continent. For years it has been completely cut off from the rest of the world. The first expedition reported that Area X was a veritable Garden of Eden. The second expedition ended in mass suicide. Every expedition since has met with an unhappy end. Annihilation follows the members of the twelth expedition (all unnamed): an anthropologist, a surveyor, a psychologist, and a biologist. Narrated by the biologist, the book tracks the twelfth expedition as they make a series of terrifying discoveries about Area X and the previous expeditions.