Conundrum may refer to: In literature: Conundrum (Doctor Who), an original novel written by Steve Lyons Conundrum (novel), a Dragonlance fantasy novel by Jeff Crook Conundrum, a memoir written by Jan Morris Conundrum Press, two book publishing companies in North America In other fields: "Conundrum" (song), an instrumental song by Jethro Tull, a fifth season episode of Star Trek: The Next Generation The "Conundrum", a mountain unicycle made by Surly Bikes "Conundrum" NSA code word for Chronona… (More on Conundrum)