The Nine Unknown is a 1923 novel by Talbot Mundy. Originally serialised in Adventure magazine, it concerns the Nine Unknown Men, a secret society founded by the Mauryan Emperor Ashoka around 270 BC to preserve and develop knowledge that would be dangerous to humanity if it fell into the wrong hands. The nine unknown men were entrusted with guarding nine books of secret knowledge. In the novel the nine men are the embodiment of good and face up against nine Kali worshippers, who sow confusion and masquerade as the true sages. The story surrounds a priest called Father Cyprian who is in possession of the books but who wants to destroy them out of Christian piety, and a number of other characters who are interested in learning their contents