I don't know the book, but I recognize the folktale that it's based on. The basic premise of "A newly married woman is poking around the house while her husband is away, and finds the remains of his previous wife (or wives)" is the story of Bluebeard. The possession is an interesting new angle.

I thought that knowing what it's based on might make it searchable, so I gave it a shot, but couldn't find anything definite.

Take a look through these two lists of retellings [link] and see if anything is familiar?

I tried to narrow the search to only graphic novels, but I am not having any luck with that, unfortunately. I am not sure if graphic novels are especially hard to search for, or if I just don't know how to effectively search for them.

Anyway, I hope this will at least help with future searches, if your book is not on the lists I linked.