The Face in the Marsh — Elizabeth Hirst

Kenzie is twenty-five, with two degrees and no job prospects. When her parents offer her a job curating their museum, Ettenby's Log Palace, she accepts out of desperation, despite their history of family conflict. She arrives praying that her secrets will stay buried, and her hard-won mental health won't relapse. Once at the Log Palace, Kenzie is fascinated by an unsettling collection of junk dolls found on the property. As she follows the thread left by the collection, she discovers a history of poltergeist activity, witchcraft and death on the small island housing the museum.