Series: Merrily Watkins #6
This installment of the series has links to Arthur Conan Doyle and his Hound of the Baskervilles. Merrily has more deliverance stuff, of course, and there's more background character development with her relationship with Lol. There is a potential haunting and although a skeptic would still find a lot to deny, I think it counts towards the 2018 Halloween Bingo Ghost Stories square.
I'm really terrible at writing about these books.