Black book with cat in circle on front, in horror section, Shadow in the title

[Jeri]

I saw a book at a book store read the cover and back and such. wanted to get it next time but cant remember the title or author.

Its a black book.
A cat sitting in the circle or just outside.
I believe "Shadow" was in the title.
It was in the Horror section.

[Lobstergirl, au gratin]

For adults?
When did you see it and what store?
Hard or paperback?