The Girls Before by Kate Alice Marshall

Audrey is a search and rescue expert who never stopped looking for her ex-best friend, Janie, who disappeared when they were teenagers. Janie used to love the local legend of a forest witch who saves girls from bad men, but Audrey knows now that for every one saved, there’s always another one lost. When she stumbles upon evidence in the forest that a teenage runaway might have actually been kidnapped from land belonging to the town’s most prominent family, she will have to dig through decades of secrets to reveal the biggest one of all: what happened to the girls before.