Daughter of Mystery by Heather Rose Jones

Margerit Sovitre did not expect to inherit Baron Saveze’s fortunes—even less his bodyguard, a ruthlessly efficient swordswoman known only as Barbara. Wealth suddenly makes Margerit a highly eligible heiress and buys her the enmity of the new Baron. He had expected to inherit all, and now eyes her fortune with open envy.

Barbara proudly served as the old Baron’s duelist but she had expected his death to make her a free woman. Bitterness turns to determination when she finds herself the only force that stands between Margerit and the new Baron’s greed.

At first Margerit protests the need for Barbara’s services, but soon she cannot imagine sending Barbara away. And Barbara’s duty has become something far more hazardous to her heart than the point of a sword. But greater dangers loom than one man’s hatred—the Prince of Alpennia is ill. Deadly intrigue surrounds the succession and the rituals of divine power known as The Mysteries of the Saints.