"Red Moon of Zembabwei" is a short story by American writers L. Sprague de Camp and Lin Carter, featuring the fictional sword and sorcery hero Conan the Barbarian created by Robert E. Howard.

[2] Following his encounter with Thoth-Amon in Stygia during the events of "Black Sphinx of Nebthu", King Conan of Aquilonia pursues his arch nemesis to the kingdom of Zembabwei.

Conan, who has entered the city to negotiate his enemy's surrender, is ignorant of this state of affairs until he finds himself thrown in the dungeon with the rightful king, who has been deposed and tortured by Nenaunir.

Murzio, a spy from the Aquilonian army, is able to slip through the sewers of Zembabwei to reach the dungeon, but is unable to release Conan.

Howard's story "The Grisly Horror" was published in the magazine Weird Tales (Feb 1935) and was later renamed "The Moon of Zimbabwei" (the inspiration for the de Camp/Carter version).