The Xipéhuz (1887) is a classic of Francophone science fiction, a novella that concerns the appearance in pre-Sumerian Mesopotamia of mysterious extraterrestrial beings composed of energy and communicating through light. Written by the Belgian author Joseph Henri Honoré Boex (1856–1940), better known as J.-H. Rosny Aine, the novella anticipates many of the themes found in H. P. Lovecraft, including prehistoric visitation from non-anthropoid extraterrestrial beings, their advanced science and culture, and these beings' indifference to the fate of humanity. Now this essential science fiction masterpiece is available in a fresh, modern translation as a standalone ebook.