The Hollow of Fear: Lady Sherlock Series, 3

Under the cover of "Sherlock Holmes, consulting detective," Charlotte Holmes puts her extraordinary powers of deduction to good use. Aided by the capable Mrs. Watson, Charlotte draws those in need to her and makes it her business to know what other people don't. When her dear friend Lord Ingram stands accused of the murder of his estranged wife, Charlotte goes under disguise to help prove his innocence to Scotland Yard.