Almost five years ago, I downloaded a free book onto my Kindle. It was about a female half-demon, half-angel protagonist who was like a paranormal P.I., sending demons back to hell. She had a demon partner, a demon lover, her guardian angel (who was later revealed to be her aunt) and her friend, a human cop. Her father was in the highest choir of angels and her mother was demon royalty as was her lover and her partner.
I cannot remember the name of the series or the author, or even the name of the female protagonist, and I no longer have access to that Kindle.
Does anyone know of how I can find this series again?