Afterlife (Magic & Mechanicals Book 6) - Jessica Marting

Ezra Thaddeus had a blissfully predictable life filled with drinking, womanizing, and looking out for himself until Claudia Drusilla Lucius crashed into it during a séance from hell. A Roman woman resurrected from the dead by unseelie fae magic, Claudia's inability to navigate the modern nineteenth century pulls at heartstrings Ezra didn't know he had, and he finds himself her guardian as she learns to be alive again.

A trip to London to see a friend's art exhibit should have been the perfect way to introduce Claudia to his interests, and she's excited to see how much the city has changed since the Londinium she knew in the fourth century. But Ezra doesn't expect his feelings for her to shift into something more, and no one expected a demon to be accidentally summoned during the exhibit. Now that it's out and terrorizing London, it's up to the only two people in the city who know about the existence of supernaturals to stop it. After all, how can he tell her how he feels if he doesn't know if he'll live another day to do so?