King Conan

King Conan is the THIRD published and contains five Howard stories (see notes).

The Gnome Press edition of Conan was the first hardcover collection of Howard's Conan stories, including all the original Howard material known to exist at the time, some left unpublished in his lifetime. Not published in order of previous publication, Gnome's volumes were organized to present the stories in order of their internal chronology, the sole exception being Tales of Conan, which skipped around to present random episodes from various points in the protagonist's career. Some stories in two of the later volumes (The Coming of Conan and King Conan) were completed or revised by L. Sprague de Camp; another (Tales of Conan) consisted of non-Conan Howard stories that de Camp rewrote as Conan yarns. The last published volume of the Gnome edition was the first Conan story by an author other than Howard, namely Björn Nyberg, and was revised by de Camp.

"The Treasure of Tranicos" is by REH and L Sprague de Camp. "The Treasure of Tranicos" was originally written as a Conan story ("The Black Stranger") that was not accepted for publication. REH rewrote it into a Black Vulmea story ("Swords of the Red Brotherhood"), which was also not accepted. L Sprague deCamp found "Swords of the Red Brotherhood" and rewrote it into a different Conan story ("The Treasure of Tranicos").
Limited edition of 4000 copies

The map of the Hyborian Age, by David Kyle, is repeated for the rear end papers.
Each story is preceded by a paragraph from "An Informal Biography of Conan the Cimmerian" by P. Schuyler Miller & John D. Clark.

Source: Wikipedia.