The Deadwood series is a classical cozy. You have a little town with its cast of quirky characters, where the main protagonists solves a crime.
The quirky characters function as the comic reliefs, a role which in this series falls mainly to grumpy senior citizen Harvey with the heart of gold (both with his stories about his sexual exploits and his role as a busybody that can't keep a secret) and Violet's children (in this volume that wants to set Violet up with her best friends dad). And of course there is sleazy Ray again.
For a cozy the crime of the first book was somewhat gruesome (a tea party with desiccated corpses). Here Violet wants to sell a house were a murder homicide was committed. Normally there is a good reason why the main protagonists wants to solve said crime. E.g. a close friend is a suspect or he/she found the body and is a suspect herself. In this particular novel it is completely unclear, why Violet wants to solve the crime so badly. She doesn't even show idle curiosity and who committed the crime has no effect on selling the house. But in doing so, she puts her life in danger (again) and angers her friends. So why does she do it.
Personally I also didn't like the conclusion was a little unsatisfying. You are told who committed the crime and even the motivation behind it, but there are some unanswered questions.
Another thing that bothered me, are dropped plots, mainly two: for one, the killer(s) mention(s) a previous victim. However, this is all readers ever hear about that. Furthermore, there is the mystery of the boxes shipped by Ray and the owner of the funeral parlor (though that might be picked up in a later volume).
The book is called optical delusions as it is still unclear whether there really are ghosts (as the majority of Deadwood's residents seem to believe, even guys such as Ray) or whether Doc and the house owner are just plain crazy.
Speaking of Doc. In most cozies the main protagonists has a romantic interest, who is either in law enforcement or helps her solve the crimes. Doc with his ability to see ghosts potentially falls int he latter category, though he doesn't really use that ability in that capacity yet. Aside from this, Doc's main draw seems to be his hotness, because he isn't actually a very likeable character. Especially his hot and cold act is rather annoying. I do hope that later books will try to make him more interesting or replace him with another love interest (though I hate love triangles and there aren't any real alternatives besides Cooper, who doesn't seem particularly interested in Violet).
Speaking of character. Natalie is a great friend and Violet keeping quiet about her involvement with Doc bothers me a lot. Especially as Natalie's fixation on the guy is also based on his looks as she knows absolutely nothing about him.
On a final note: Kelly's father turned his entire life around because of his crush on Violet. The guy is a little creepy, especially his sleazy come-on. However, this shows kind of a bleak future for Kelly, once he finally gets it through his head that Violet isn't interested in him. Sort of depressing. I would have hoped that he cared more for his child than for some random stranger.
Overall, the series isn't a bad read, but there are a lot of cozies out there and this still isn't one of my favorites.