Question: Move Under Ground combines the cosmic horror of H.P. Lovecraft's Cthulhu Mythos with the Beat style of an American novelist and poet who was born when?

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Cthulhu: Cthulhu ( ; for variant pronunciations, see below) is a cosmic entity created by writer H. P. Lovecraft and first introduced in the short story "The Call of Cthulhu", published in the American pulp magazine "Weird Tales" in 1928.  Considered a Great Old One within the pantheon of Lovecraftian cosmic entities, the creature has since been featured in numerous popular culture references.  Lovecraft depicts Cthulhu as a gigantic entity worshipped by cultists.  Cthulhu's appearance is described as looking like an octopus, a dragon and a caricature of human form.  Its name was given to the Lovecraft-inspired universe where it and its fellow entities existed, the Cthulhu Mythos.

Fall of Cthulhu: Fall of Cthulhu is a 2007 American comic book series, written by Michael Alan Nelson and published in 2007 by Boom!  Studios.  Creatively influenced by H.P. Lovecraft's Cthulhu Mythos, particularly "The Call of Cthulhu", the main characters of the series find themselves swept up in an ancient and elaborate plot, designed by the dark god Nyarlathotep to provoke an apocalyptic war between powerful beings known as the Great Old Ones.

Cthulhu Mythos: The Cthulhu Mythos is a shared fictional universe, based on the work of American horror writer H. P. Lovecraft.  The term was coined by August Derleth, a contemporary correspondent and protégé of Lovecraft's, to identify the settings, tropes, and lore employed by Lovecraft and his literary successors.  The name "Cthulhu" derives from the central creature in Lovecraft's seminal short story, "The Call of Cthulhu", first published in the pulp magazine "Weird Tales" in 1926.  Richard L. Tierney, a writer who also wrote "Mythos" tales, later applied the term "Derleth Mythos" to distinguish Lovecraft's works from Derleth's later stories, which modify key tenets of the "Mythos".  Authors of Lovecraftian horror in particular frequently use elements of the Cthulhu Mythos.

Jack Kerouac: Jack Kerouac ( or , born Jean-Louis Kérouac (though he called himself Jean-Louis Lebris de Kérouac); March 12, 1922 – October 21, 1969) was an American novelist and poet.

Move Under Ground: Move Under Ground is a horror novel mashup by Nick Mamatas which combines the Beat style of Jack Kerouac with the cosmic horror of H. P. Lovecraft's Cthulhu Mythos.  It is available as a free download via a Creative Commons license.

Hyperborean cycle: The Hyperborean cycle is a series of short stories by Clark Ashton Smith that take place in the fictional prehistoric setting of Hyperborea.  Smith's cycle takes cues from his friends, H. P. Lovecraft and Robert E. Howard and their works.  Lovecraft wrote to Smith in a letter dated 3 December 1929: "I must not delay in expressing my well-nigh delirious delight at "The Tale of Satampra Zeiros" [Smith's short story]... [W]hat an atmosphere!  I can see & feel & smell the jungle around immemorial Commoriom, which I am sure must lie buried today in glacial ice near Olathoe, in the Land of Lomar!" .  Soon afterward, Lovecraft included Smith's Tsathoggua (which originally appeared in "The Tale of Satampra Zeiros") in the story "The Mound", ghostwritten for Zelia Reed (Zelia Bishop) in December 1929.  Lovecraft also mentioned Tsathoggua in "The Whisperer in Darkness", which he began on February 24, 1930.  Because Smith in turn borrowed numerous Lovecraftian elements, the cycle itself may be regarded as a branch of the Cthulhu Mythos.  In a letter to August Derleth dated 26 July 1944, Smith wrote: "In common with other weird tales writers, I have ... made a few passing references (often under slightly altered names, such as Iog-Sotot for Yog-Sothoth and Kthulhut for Cthulhu) to some of the Lovecraftian deities.  My Hyperborean tales, it seems to me, with their primordial, prehuman and sometimes premundane background and figures, are the closest to the Cthulhu Mythos, but most of them are written in a vein of grotesque humor that differentiates them vastly.  However, such a tale as "The Coming of the White Worm" might be regarded as a direct contribution to the Mythos." .

Elder Sign (card game): Elder Sign is a cooperative card and dice game, based on the Cthulhu Mythos of horror writer H.P. Lovecraft and Chaosium's Call of Cthulhu roleplaying game.  It is published by Fantasy Flight Games, which also produces the Cthulhu Mythos games "Arkham Horror", "", "Mansions of Madness", and "Eldritch Horror".

Arkham Horror: The Card Game: Arkham Horror: The Card Game is produced by Fantasy Flight Games.  It is a cooperative game set in the universe of Chaosium's "Call of Cthulhu" roleplaying game which is based on the Cthulhu Mythos of H.P. Lovecraft and other horror writers.  The setting of the game is based in the titular (fictional) town of Arkham, MA.  The game was originally leaked in May 2016, before being officially announced in August of that same year.  It made its first limited public release at Arkham Nights 2016 to a sold out crowd.

Arkham Horror: Arkham Horror is an adventure board game designed by Richard Launius, originally published in 1987 by Chaosium.  The game is based on Chaosium's roleplaying game "Call of Cthulhu", which is set in the Cthulhu Mythos of H.P. Lovecraft and other horror writers.  It was revised and reprinted by Fantasy Flight Games in 2005.  In this game, players take on the role of investigators in Lovecraft's Massachusetts town of Arkham.  Gates to other planes open throughout the town.  If too many gates open, a powerful alien being will enter, likely destroying the town and possibly threatening the world.  The investigators must avoid or fight alien creatures that enter Arkham through the gates, enter the gates themselves, survive the alien places beyond, return to Arkham, and close the gates.

Yig: Yig (the Father of Serpents) is a deity in H.P. Lovecraft's Cthulhu mythos.  He first appeared in the story "The Curse of Yig", which was created by Zealia Bishop and almost completely rewritten by Lovecraft.  In this story he is described as "shapen like a man, except ye look at him clost."  According to Lovecraft, one of Yig's main characteristics is his devotion to snakes - his "children" - he punishes those that harm them by turning them into spotted snakes.

Supporting paragraphs: Move Under Ground Jack Kerouac
Answer: March 12, 1922