TLDR recap:

A drifter haunted by a brutal past, Devlin is a bushman who lives a lonely life on the edge in the Australian Outback.  At the tender young age of 200 years old, Lady Daniela, a rare “born” vampire who is heiress to her own province in Oz, is sought after by scheming male vampires trying to increase their own standing who are willing to kill or viciously torture her to achieve their goals.  Danny has never had a fully-marked human servant and Dev willingly submits to no one, but their unlikely emergency partnership could take them on an emotional journey neither is prepared for.

TLDR recap:

On a mission to track down a dangerous continuing threat to the Breed, Tegan must face his centuries-old demons and open his heart if he’s to complete the hunt.  Elise, widowed and having recently lost her only son to the killer vampire drug Crimson, is slowly dying to the side-effects of her Breedmate talent.  With her connections in the Agency’s politics, Elise can open doors for Tegan and the order, but she’ll have to surrender some of herself to survive long enough to avenge her son’s death.