"The Mystery of the Secret Band" by Edith Lavell is a young adult mystery novel written in the early 20th century. The story revolves around the resourceful and ambitious protagonist, Mary Louise, who aspires to follow in her father's footsteps as a detective. As Christmas approaches, she is presented with an opportunity to solve a series of thefts at a boarding house in Philadelphia, leading her into a web of intrigue and a search for a missing girl. The opening of the novel establishes a cozy, festive atmosphere as Mary Louise returns home from a school entertainment, filled with excitement for her vacation. However, she quickly learns of a troubling situation involving a hotel for women where valuables have gone missing. After a discussion with her father, a detective, Mary Louise eagerly accepts a job to investigate the thefts, despite the potential to miss out on holiday festivities with her friends. Her determination to prove herself and follow her detective instincts sets the stage for a compelling adventure filled with mystery, danger, and the promise of self-discovery. (This is an automatically generated summary.)