14-year-old Enola Holmes wakes on her birthday to discover that her mother has disappeared from the family's country manor, leaving only a collection of flowers and a coded message book. With Sherlock and Mycroft determined to ship her off to a boarding school, Enola escapes, displaying a cleverness that even impresses the elder Holmes. But nothing prepares her for what lies ahead...

Book One in the series includes three thrilling mysteries: The Case of the Missing Marquess, The Case of the Left-Handed Lady, and The Case of the Bizarre Bouquets. At the back of the book, readers can explore a portfolio of pages from Enola's secret notebook!