Sentinel Rising: The Reardon Files #1
By Andrea Drew

I guess you could describe this as a standard PI story set in the suburbs of Melbourne in Aus. Except the PI Connor is a Sentinel. Now I had no idea what a Sentinel was until i read this book, but apparently a Sentinel sees dead folk. Which is handy when you're investigating a murder. It cuts out all that bothersome stuff like looking for clues and doing the graft.
So a girl is murdered and the obvious suspect is the husband who's recently remortgaged the house and there's some weird stuff going on with cross dressing and black mail is suspected. But all of that is red herrings. Sorry if that wrecks the tale, but everyone excepts there's going to be red herrings getting in the way, eh?
I've got to be honest the supernatural stuff didn't do it for me, but if you like that sort of stuff give it a try. I like my PI's straight, investigative, smoking and drinking rye from the bottle. But that's just me.