Four sons of Horus Nekhen. In Spells 112 and 113 of the Book of the Dead which have their origins in the earlier Coffin Texts Spells 157 and 158, it is described how Horus has his eye injured, and because of this is given the sons of Horus: The injury of Horus's eye is part of the myth cycle known as the Contending of Horus and Set recounting how they fought over the crown of Egypt. In a unique illustration in the tomb of Ay the sons of Horus are shown wearing the red and white crowns as the Souls of Pe and Nekhen,
The Horus Heresy (novels) series became a sales success in its category. "Horus Rising" by Dan Abnett, the opening title, set the pace shortly after its release, topping "Locus" magazine's "Locus Bestsellers: Gaming-Related" list of August 2006; practically every title in the series had achieved the same or similar performance on this chart. "Horus Rising"s January 2011 CD audiobook release also appeared in ranked sales lists: the (abridged) edition was number 15 in a related chart published by "The Bookseller", covering 2011 UK sales up to September. "Legion" by Abnett, and "Battle for the Abyss" by Ben Counter, were listed in Nielsen BookScan's list