About the book: 1911 / The guest, a bearded brunette of average height, is ready to pay twice the price for a room, but Mrs. Warren is not happy with the new tenant, who walks and walks around his room - at night, in the morning, during the day. Her detailed story aroused the interest of Sherlock Holmes, who is ready to begin an investigation, because the person living in the room is clearly not the same person who rented it.