I think these are all small press or indie releases. All free, today at least, on Amazon US.
Disclaimer: I haven't read any of these. I have read independent reviews of other works by these authors, and seen interest/discussion about the authors on MobileRead (and added some of the authors' other books to my TBR list as a result).
Painted Truth (Alix Thorssen Mysteries) by Lise McClendon
http://www.amazon.com/dp/B003NUQPO4
"Set in Jackson Hole where the Old West merges with upscale art galleries and adrenaline adventures, this second mystery featuring Alix Thorssen (after The Bluejay Shaman) finds the art dealer on her home-ground but without the comforts of home. Her partnership and gallery with sexy Paolo Segundo are at a crossroads. When another gallery on the town square burns, revealing the body of a famous artist, Alix is drawn into the investigation as an appraiser of the lost paintings."
Two from J.R. Rain:
The Vampire Who Played Dead (Spinoza Trilogy #2)
http://www.amazon.com/Vampire-Played.../dp/B004ZVDFLG
and
The Vampire in the Iron Mask (Spinoza Trilogy #3)
http://www.amazon.com/Vampire-Iron-S.../dp/B00A1E8SNG
From the description, it looks like you'll really want to start with part 1 of the trilogy: not free today, but maybe already in your collection (or available at another time).
KentE