No Rest for the Departed — Nancy Herriman

When a murder may hold clues to the death of Nick's sister, he and Celia will go up against San Francisco's privileged and powerful to unearth the truth. Detective Nick Greaves has always been haunted by the death of his younger sister, and that pain is brought vividly to the surface when a dead body fished out of the bay turns out to be her former beau. Certain that the man was murdered to cover up what he knew about his sister's tragic end, Nick is determined to find the man's killer. And when Celia turns up information that could be crucial to his investigation, he reluctantly agrees to accept her help. But no sooner do they begin their search than it becomes clear that powerful forces are at work to stop them. First Celia is threatened when she looks into the shady dealings of a wealthy family's fashionable auction house, and then an innocent man is killed when he's hit by a bullet intended for Nick. With mounting evidence pointing to high-end smuggling and police corruption, Celia and Nick must face down San Francisco's elite to catch the killer-and to find answers that may finally let Nick put his demons to rest.--