The Enola Holmes mysteries:
The Case of the Missing Marquess
The Case of the Left-Handed Lady
The Case of the Bizarre Bouquets
The Case of the Peculiar Pink Fan
The Case of the Cryptic Crinoline
The Case of the Gypsy Goodbye
By Nancy Springer
Paperbacks, 188 pages average
2006-2010, Puffin Books
The Enola Holmes series revolves around the life of the younger sister of well-known brothers, Sherlock and Mycroft. Estranged from her brothers and living with her suffragette mother in their country estate, Enola has grown up left mostly to her own devices, which is fitting, as she often reminds herself, Enola is “alone” spelled backward. Her mother’s disappearance sparks the start of a new life for Enola, during which her brothers try to force their renegade sister into boarding school so she can be molded into a “proper woman.” Enola is having none of this, so she follows the cryptic clues left by her mother and makes her way to London, where she’ll solve more than just the mystery of her disappearing mother.
There are six books in this series, which could be read as stand-alone novels well enough, but I would recommend reading them all in order.