The Sign of the Spider is a classic British adventure novel, first published in 1896. Bertram Mitford takes the genre of imperialistic adventure stories and turns it on its head, creating an anti-hero as protagonist and weaving throughout the story a deliberate look at racial attitudes and cultural differences within colonial-period Africa. Mitford manages to spin a tale that is compelling in plot and characterization.

This novel is also a classic in cryptozoological fiction. The arachnid-beast that provides the climax struggle is arguably one of the most fascinating creatures to appear in an adventure novel.