A Case of Identity by Arthur Conan Doyle is a clever and unsettling Sherlock Holmes mystery that explores themes of deception, manipulation, and misplaced trust. When the young and naïve Mary Sutherland seeks Holmes’ help in locating her mysteriously vanished fiancé, Hosmer Angel, Holmes quickly deduces that the truth is far stranger than she suspects. As he unravels the case, he exposes a cruel scheme orchestrated by someone much closer to Mary than she realizes, revealing a deception driven by selfishness and control. A Case of Identity showcases Holmes’ keen understanding of human nature and his ability to uncover the hidden motives behind even the most personal betrayals.