Hour of the Dragon

From AoCWiki

The Hour of the Dragon is one of the original stories by Robert E. Howard and his only full length novel about Conan the Cimmerian. Originally written for a British publisher Dennis Archer, it was later published as a five part serial in Weird Tales between the months of December 1935 to April 1936 after the initial publisher folded. It is considered by many to be one of his best works.