The Valley of Fear plunges Sherlock Holmes into a world of secret societies, treachery, and vengeance. As Holmes deciphers a mysterious cipher, he uncovers a tale of brutality and betrayal that spans continents. In His Last Bow, an aging Holmes emerges from retirement for one final mission on the eve of World War I, showcasing his unwavering dedication to justice. Both works capture the breadth of Holmes’ career, from youthful brilliance to his twilight years, solidifying his place as the quintessential detective.