Here it is:
https://www.amazon.com/Straight-Hell...michelle+scott
Straight to Hell
I was expecting a typical cozy, but it's not. It's cruising along being cozy and then:
Spoiler:
the main starts shoplifting. Not because she needs the items, but basically because she is in the employ of the devil trying to save her own bacon. This isn't something you typically find in cozies, but I continued on. In a typical cozy, the main would have found a way around the requirement that she do something like shoplift to prove her loyalty. There were other bits like this--she's supposed to push someone to his death. She does it, but the guy is saved--not by her and not by her means, so I'm thinking it really is cozy, but then...Last, but not least, at the end of the book, she's in a situation where she can prove her loyalty or gain her tokens or whatever by sleeping with her sister's boyfriend (luring him to the dark side so to speak) and ...she does it. The book essentially ends on that dark note where instead of the redemption that you'd expect in a cozy, you've got this gal who has fallen further and further into this mess. Yet the book is cozy in most other respects (the love interest, the setting, the premise, her fetish with shopping, etc).
So cozy noir does exist. There was another book I read that I'd put in that category, but I don't remember the title or the author at the moment. It's not really a genre I read on purpose.