Books similar to blue is for nightmares, but maybe for adults?

I loved blue is for nightmares series as a child, and would like to see if there is something similar for adults?

I really like:
– the witchcraft/Wiccan aspect
– the mystery solving

I’ve looked into Ninth house by Leigh Bardugo, that’s on my list.

Please no young adult series, and would like characters to be adults.