Maiden's Wolf. In Deception's Shadow, #3

When unforeseen circumstances force natural enemies to become allies, something far more enduring than animosity is born-friendship. Beatrice, a young healer living on the outskirts of the human port settlement of River's Divide, simply wishes to hide herself from the searching eyes of the Priesthood of the Revealing Light. The last thing she wants 'revealed' is that she is host to a Larnkin-a spirit creature of vast and forbidden magic.
Her already complicated life grows more perilous when a lupwyn scout stumbles into a trap set by the priesthood. If she sits back and does nothing, the wolf-like shapeshifter will be drained dry by the priests until he is an empty, soulless slave. As a healer, that isn't something she will allow. But lupwyns have no love for the newly arrived humans. For the sake of mutual survival, Beatrice hopes this lupwyn can see beyond the hatred caused by two warring peoples.
If not, she might die at the hands of the male she is trying to save. Author's Note:Maiden's Wolf is a complete standalone story and can be read on its own. However, I would suggest reading the series in order for maximum enjoyment. In Deception's Shadow reading order:Betrayal's PriceHerd MistressMaiden's WolfDeath's Queen