Books like Blood Wolf Dawning by Rhyannon Byrd

In this paranormal romance, Carpathian Dimitri Tirunul battles Lycan extermination while Skyler Daratrazanoff, a human, becomes his essential ally and lifeline.

"Lillian Rosewood leads an ordinary, boring life working as the manager of a psychiatric hospital. The highlights of her day, other than her skinny hot chocolate, are the hunky guards who work in the secure section. Until a late-night emergency is wheeled in. Captain Jack Harper is insane, drop-dead gorgeous...and just had his abdomen shredded. Despite the fact they're not an emergency room, Lillian can't turn him away and risk a death on her hands. Unable to get the handsome soldier out of her mind, Lillian sneaks into the restricted area to check on him. What she finds is beyond belief. Somehow Jack has managed to heal himself from a near-fatal wound in mere hours. When one of the doctors, Walker, attempts to rape her, things go from bad to worse. In the blink of an eye, Jack is loose and Walker is dead... and Lillian must accept a truth about her rescuer that will change her world forever. What if the patients aren't insane? What if their stories of secret government experiments and monsters are true?"--Publisher description.

When a Pinkerton detective and a Confederate spy—both half‑vampires—team up to stop a plot to assassinate President Lincoln, they must also fend off rogue vampires and navigate a growing romance amid the Civil War.

Wyatt Pallaton struggles to control his attraction to the enigmatic Elise Drake, whose strength and vulnerability compel him to confront his own desires in a world where werewolves and danger collide.