Robert E. Howard "The movie is regarded as a departure from Robert E. Howard's Conan series and owing much more to the original script and direction of John Milius. Some aspects of the film are drawn from different pieces of Howard's works, though many of those are conspicuously inconsistent with his Conan character. For example, while a character named Valeria appears in Red Nails, the film character's attachment to Conan and her return from the dead to save his life are more akin to Bêlit of Queen of the Black Coast. Certain elements seem to have been borrowed from non-Conan sources, including the face-changing Snake Folk and the Thulsa Doom character which originated in Howard's Kull stories. Conan's encounter with the witch in the film bears some similarity to Worms of the Earth from yet another of Howard's series, Bran Mak Morn. Thulsa Doom's monologue about fearing the dark are also drawn from that work." "Thulsa Doom: "Infidel defilers. They shall all drown in lakes of blood. Now they will know why they are afraid of the dark. Now they learn why they fear the night." " Source and further information: http://en.wikipedia.org/wiki/Conan_the_Barbarian_(film)