The best detective novels with sleuths who aren't cops

Book cover of The Windsor Knot Book cover of Inherent Vice Book cover of The Marlow Murder Club Book cover of The Sign of Four Book cover of A Spoonful of Murder

The best crime books set during the interwar years capturing the spirit of Agatha Christie & Sir Arthur Conan Doyle

Book cover of Shadow of the Moon Book cover of The Sign of Four Book cover of Master of the Game Book cover of Hercule Poirot's Christmas Book cover of The Eagle Has Landed

The best novels about hunting for a treasure that isn’t gold

Book cover of The Secret: a Treasure Hunt Book cover of Map of Bones Book cover of The Sign of Four Book cover of The Labyrinth of Osiris Book cover of Thunderhead

Want books like The Sign of Four?

Our community of 13,000+ authors has personally recommended 89 books like The Sign of Four.

Book cover of The Eagle Has Landed Book cover of The Windsor Knot Book cover of Thunderhead Book cover of The Labyrinth of Osiris Book cover of Map of Bones Book cover of The Secret: a Treasure Hunt

Browse books like The Sign of Four

5 book lists we think you will like!