Young Miss Holmes, Casebook 1-2

Christie is Sherlock Holmes' precocious niece. She lives in a beautiful home with her maids and her giant dog Nelson, who look after her in the absence of her parents. Her maids include the proper Annemarie and the unrefined, uneducated Nora, whose skill with her "Snake Tongue" whip occasionally comes in handy. Though Christie hates studying, she loves using logic to solve mysteries, and so she often ends up helping her uncle and Dr. Watson solve their cases.