Uncharted Waters - Ravenwood Mysteries, #6

Ninety-nine days remain in Isobel Amsel's sentence, and the world keeps spinning - just not for Isobel. Her twin brother disappears for unknown reasons, and she's left pacing in her cage like a tiger. While Isobel's rebellious adopted daughter, Sao Jin, keeps her on her toes, Riot is left to sort out his crumbling finances. And find a ring, which proves far more difficult than he imagined. With Isobel's release date closing in, Riot tries to sort out his life, his motivations, and his impending wedding, while Bel faces the question of what marriage and motherhood really mean. A suspenseful Victorian mystery with a strong female lead and a romantic detective duo in San Francisco's lawless Barbary Coast.
Fans of Laurie R. King, Deanna Raybourn, and C. S. Harris will love this thrilling historical mystery series.