Reddit reviews The Scent of Shadows (Sign of the Zodiac, Book 1)
We found 1 Reddit comments about The Scent of Shadows (Sign of the Zodiac, Book 1). Here are the top ones, ranked by their Reddit score.
Sounds like you're looking for a Las Vegas based urban fantasy. The most well known series I can think of is by Vicki Petterson (Book One is The Scent of Shadows. Matt Forbeck also did a book set in Vegas: Vegas Knights. I'm fairly certain a large part of Steven Brust's The Incrementalists takes place in Vegas as well.
There seems to be quite a bit of self-published stuff set in Vegas. Could this have been a self-published story?