A Study in Scarlet Women

To my knowledge Sherlock Holmes does not have a sister named Charlotte who consults with him on cases. Apparently the good people of London aren't aware of that and Charlotte is able to find clients and solve cases with this ruse.

In A Study in Scarlet Women by Sherry Thomas, Charlotte Holmes takes drastic measures when her father reneges on his promise to pay for her education. Taking matters into her own hands, Charlotte decides to dally with Roger Shrewsbury only to be discovered flagrante delicto by his wife and several of her women friends.

As a "fallen" women Charlotte's parents are determined to keep her cloistered in the country, but Charlotte is not to be denied. She flees to London and tries to find a legitimate way to support herself.

When Charlotte meets Mrs. Jebediah, a woman with means and maybe a few secrets, they decide to

form their own inquiry agency using an ailing Sherlock Holmes as their partner. They become involved in several cases including the death of Lady Shrewsbury, Roger's mother, and several others that Charlotte deduces may be connected.

Through an old family contact, Charlotte has the ear of a Scotland Yard detective who is enamored with his peripheral association with the great Sherlock Holmes in solving these crimes. 

A Study in Scarlet Women is a terrific parody of the Sherlock Holmes books. Charlotte has all his deductive skills without his annoying quirks.

I do hope there is a second book in this series.