Question: Which author wrote a novel containing a horror icon known as Pennywise the Dancing Clown?

Context paragraphs:
Demon's Delight: Demon's Delight is an anthology novel containing four short stories written by authors MaryJanice Davidson, Emma Holly, Vickie Taylor, and Catherine Spangler.

It (character): It, also known as Pennywise the Dancing Clown or Bob Gray, is the title character of Stephen King's 1986 horror novel "It".  The character is a creature that preys upon the local children of Derry, Maine, roughly every twenty-seven years, using a variety of powers that include the ability to shapeshift, manipulate, and go unnoticed by adults.

Bill Skarsgård: Bill Istvan Günther Skarsgård (born 9 August 1990) is a Swedish actor and model, known for his roles in "Simple Simon", "Hemlock Grove", "Atomic Blonde" and Pennywise the Dancing Clown in the 2017 film "It".

Alan Moore's Magic Words: Alan Moore's Magic Words (ISBN  ) is a graphic novel containing some of comic creator Alan Moore's songs, poems and writings turned into comics or with added art.  All the adaptations are made by writer Art Brooks.  The art was created by various European artists: Fred Torres, Ailantd, Sergio Bleda, Juan Jose Ryp, etc.  It was printed by Avatar Press in both hardback and softback in 2002.  Reprints the original GN published in Europe as Magical Mystery Moore Vol.  1.

Vandread Extra Stage: Vandread Extra Stage is a light novel containing a collection of five short stories about several important characters from the anime Vandread.  The book is set in the same story as the anime, however some of the stories are set before and after the series.

The Pendulum: The Pendulum is a 12-issue miniseries of comic books based upon the Dark Carnival universe, a mythology detailed in the music of the Insane Clown Posse.  Distributed by Chaos!  Comics, the series was published from January 2000 until December 2001.  A graphic novel containing all 12 issues was released on August 20, 2002 along with an album featuring most of the Pendulum singles.  It is the group's 5th compilation album, and their 17th overall release.

The Temple of My Familiar: The Temple of My Familiar is a 1989 novel by Alice Walker.  It is an ambitious and multi-narrative novel containing the interleaved stories of Arveyda, a musician in search of his past; Carlotta, his Latin American wife who lives in exile from hers; Suwelo, a black professor of American History who realizes that his generation of men have failed women; Fanny, his ex-wife about to meet her father for the first time; and Lissie, a vibrant creature with a thousand pasts.

Skattejakten (novel): Skattejakten (in English "The Treasure Hunt"; this novel has been translated into English) is a Norwegian novel containing clues to a real-world treasure hunt.  It is written by the author Margit Sandemo.  The novel is only 124 pages long, and is possibly the shortest book the author has written.  Skattejakten has not been reprinted after it was first published in 1999.

Horror icon: A horror icon is a person or fictional character that is considered to be significant to one or more genres of horror such as film, literature, or video games.  Examples of people considered to be horror icons include directors Stephen King, Kiyoshi Kurosawa, Roger Corman, and Wes Craven, and actors Vincent Price, Barbara Steele, Lon Chaney and Lon Chaney, Jr., Boris Karloff, Bela Lugosi, Robert Englund, Tony Todd, Tim Curry, Brad Dourif, and Christopher Lee.  Fictional horror icon characters include such as Dracula, Gill-man, Frankenstein's monster, Michael Myers, Freddy Krueger, Jason Voorhees, Chucky, Candyman, Leatherface, Pennywise the Dancing Clown, Pinhead, and The Mummy.

Pseudo-Ambrose: Pseudo-Ambrose is the name given by Erasmus to refer to the author of a volume containing the first complete Latin commentary on the Pauline epistles.  Alexander Souter has established that the same author wrote the "Quaestiones Veteris et Novi Testament", which had long been attributed to Saint Augustine.  Other works ascribed to the same author, less definitely, ore the "Lex Dei sive Mosaicarum et Romanorum legum collatio," "De bello judaico", and the fragmentary "Contra Arianos" sometimes ascribed to the pseudo-Hilary and the "sermo 246" of pseudo-Augustine.  They mention Simon Magus.

Supporting paragraphs: Horror icon It (character)
Answer: Stephen King