Books similar to The Sign of the Four by Arthur Conan Doyle
Discover books connected to The Sign of the Four by Arthur Conan Doyle. Books from the same collection appear first, followed by works sharing at least three topics. Shared genres are used as an additional ranking factor.





















This page contains 22 books connected to The Sign of the Four by Arthur Conan Doyle. The closest matches are determined primarily through shared thematic relationships.
The thematic comparison is based on the main topics connected with The Sign of the Four, including Betrayal, colonial India, crime investigation, Dr. Watson, exotic background, Justice, Locked-room mystery, London, mystery solving, opium, police collaboration, and Revenge. Books without a shared collection must match at least three of these topics to appear in the list.
Genre similarity is used as an additional ranking signal through categories such as Philosophical novels, Fiction, Novels, Philosophical fiction, Prose, Psychological fiction, Psychological novels, and Science fiction. A shared genre alone is not enough for a book to appear on this page. Genres affect the order only when eligible books have the same number of shared topics.
Rating, rating count, views, and title are used only when the main collection, topic, and genre signals are equal. These additional criteria keep the ordering stable without replacing literary similarity as the main selection principle.
Some of the strongest matches are A Study in Scarlet, The Adventure of the Crooked Man, The Adventure of the Cardboard Box, The Valley of Fear, The Doctor’s Case. These books appear near the beginning because they have the closest available combination of topic, and genre relationships with The Sign of the Four.