\"The Red House Mystery\" is a captivating detective novel written by A. A. Milne. Set in an English country house, the story follows the intriguing events surrounding the murder of Mark Ablett, the master of the Red House. As the investigation unfolds, the readers are introduced to an array of intriguing characters, including the amateur detective Antony Gillingham and his friend Bill Beverley. The duo embarks on a quest to unravel the truth, encountering unexpected twists and turns along the way. Milne\'s skillful storytelling and clever plot twists keep readers engaged as they try to solve the mysterious murder and uncover the hidden secrets of the Red House.