History of Wild Places by Shea Ernshaw

[Atria] In this “riveting, atmospheric thriller that messes with your mind in the best way” (Laini Taylor, New York Times bestselling author), three residents of a secluded, seemingly peaceful commune investigate the disappearances of two outsiders. Travis Wren has an unusual talent for locating missing people. Often hired by families as a last resort, he takes on the case of Maggie St. James—a well-known author of dark, macabre children’s books—and is soon led to a place many believed to be only a legend. Called Pastoral, this reclusive community was founded in the 1970s by like-minded people searching for a simpler way of life. By all accounts, the commune shouldn’t exist anymore and soon after Travis stumbles upon it…he disappears. Just like Maggie St. James. Years later, Theo, a lifelong member of Pastoral, discovers Travis’s abandoned truck beyond the border of the community. No one is allowed in or out, not when there’s a risk of bringing a disease—rot—into Pastoral