Saffron Wilds by Kai Butler

Someone’s cat is missing and Parker Ferro, San Amaro’s best paranormal PI can’t find it.

Parker Ferro has cracked some tough cases, so he didn’t think a missing cat would be the investigation to ruin his five star rating. But months in, he still can’t find the feline and the only lead he can track points straight to a dead body. With Paranormal Crimes now involved, Nick joins Parker when they head straight into the illegal world of familiar theft.
As the body count rises, Parker and Nick are drawn deeper into a darker game than they’ve ever played before, and drag the people around them in with them.
When shadows begin to move, fae politics gets bloody, and the Dark Realm prepares for war, Parker and Nick are faced with a threat to the lives of all of the thousand realms. To win, they’ll need to decide how much they can bear to sacrifice.