Book where grandfather dies early on and the main character possibly sees spirits/demons?

The only thing I remember about this book is the dust cover was bright orange almost neon it was a hardback and under the dustcover was black with coffins and eyes imprinted in there where no pictures just text on the orange cover except for a few small drawings of coffins and eyes

I read this book when I was 12 or 13 which was 4 or 3 years ago

I don't remember much of what happened as I never actually got to finish the book but I'm sure I remember the pov being a young girl or boy after their grandfather or uncle died? I'm sure I also remember there being spirits or demons that she talks to? Though I'm less sure on that 😭 I've been trying to find this book on and off for years any help is appreciated