Mrs. Jeffries Defends Her Own: Penguin Publishing Group

 She keeps house for Inspector Witherspoon...and keeps him on his toes. Everyone’s awed by his Scotland Yard successes—but they don’t know about his secret weapon. No matter how messy the murder or how dirty the deed, Mrs. Jeffries’ polished detection skills are up to the task...proving that behind every great man there’s a woman—and that a crimesolver’s work is never done.
When the general office manager of Sutcliffe Manufacturing is murdered, no one is really surprised. Ronald Dearman was anything but a dear man. The tyrannical bully had more than enough enemies to go around. But who hated him enough to walk into his office and put a bullet between his eyes?
For once, Inspector Gerald Witherspoon doesn't get the case; it's given to another inspector.  Then someone from Mrs. Jeffries' past—someone she'd hoped to never see again—shows up and begs for her help. Now Mrs. Jeffries must step into the fray and stop a terrible miscarriage of justice…