Title: Wicked (novel series)
Content:  Wicked is a series of young adult novels written by American authors Nancy Holder and Debbie Viguié. The first book, Witch was released in 2002 through Simon Pulse. In 2009 the series was optioned by DreamWorks' Mark Sourian, with the intent to combine the first two books in the series into a single screenplay.
Title: The Wicked (2013 film)
Content:  The Wicked is a 2013 American horror film directed by Peter Winther and starring Devon Werkheiser, Justin Deeley, Jess Adams, Jamie Kaler and Caitlin Carmichael.
Title: Wicked (musical album)
Content:  Wicked is a cast recording containing the majority of the songs from the Tony Award-winning Broadway musical Wicked, with music and lyrics by composer Stephen Schwartz and a book by writer Winnie Holzman. Released on December 16, 2003 by Decca Broadway both in physical and digital releases. The former contains a foreword and a short synopsis, provided by Gregory Maguire, who wrote the 1995 novel on which the musical is based, in addition to lyrics to those songs included. Composer and lyricist of Wicked, Stephen Schwartz, produced the album aided by Frank Filipetti, Jill Dell'Abate, Jason Spears, Justin Shturtz, Jason Stasium and Ted Jensen. The original cast album of Wicked was 
Title: Wicked (Maguire novel)
Content:  Wicked: The Life and Times of the Wicked Witch of the West is an American novel published in 1995, and written by Gregory Maguire with illustrations by Douglas Smith. It is a revisionist exploration of the characters and setting of the 1900 novel The Wonderful Wizard of Oz by L. Frank Baum, its sequels, and the 1939 film adaption The Wizard of Oz. However, compared to the originals, the book is intended for adults, as it contains profanity and adult content, including violent imagery and sexual situations. It also presents events, characters and situations from Baum's books and the film in new ways, making numerous alterations. It is the first in The Wicked Years series, and was followed by Son of a Witch (published in September 2005), A Lion Among Men (published in October 2008), and Out of Oz (published in November 2011). In 2003, the novel was adapted as the Tony Award-winning Broadway musical Wicked.
Title: Lisa Jackson (author)
Content: Wicked Game (February 2009) ; Wicked Lies (June 2011) ; Something Wicked (June 2013) ; Wicked Ways (November 2014) Written with Nancy Bush
Title: Wicked, Wicked
Content:  Wicked, Wicked is a 1973 horror-thriller film written and directed by Richard L. Bare and starring David Bailey, Tiffany Bolling and Randolph Roberts. It was presented in "Duo-Vision", a gimmick more commonly known as split-screen.
Title: Wicked (1998 film)
Content:  Wicked is a 1998 American thriller film directed by Michael Steinberg and starring Julia Stiles as a disturbed teenage girl. The film also stars Michael Parks and William R. Moses.
Title: The Wicked Girls
Content:  The Wicked Girls (ISBN: 978-1-847-44520-9) is a book written by Alex Marwood (pseudonym adopted by Serena Mackesy) and published by Sphere Books (an imprint of Little, Brown and Company) on 16 February 2012 which later went on to win the Edgar Award for Best Paperback Original in 2014.
Title: Gregory Maguire
Content:  Gregory Maguire (born June 9, 1954) is an American novelist. He is the author of Wicked: The Life and Times of the Wicked Witch of the West, Confessions of an Ugly Stepsister, and several dozen other novels for adults and children. Many of Maguire's adult novels are inspired by classic children's stories; Wicked transforms the Wicked Witch of the West from L. Frank Baum's 1900 book The Wonderful Wizard of Oz and its 1939 film adaptation into the misunderstood green-skinned Elphaba Thropp. The blockbuster 2003 Broadway musical Wicked was inspired by Maguire's first novel for adults. Written by Stephen Schwartz and Winnie Holzman, the musical is currently Broadway's fifth longest-running show (surpassing Les Misérables on October 28, 2019), and at its peak nine companies ran simultaneously around the world.
Title: Wicked (musical)
Content:  Composer and lyricist Stephen Schwartz discovered Maguire's 1995 novel Wicked: The Life and Times of the Wicked Witch of the West while on vacation, and saw its potential for a dramatic adaptation. However, Maguire had released the rights to Universal Pictures, which had planned to develop a live-action feature film. In 1998, Schwartz persuaded Maguire to release the rights to a stage production while also making what Schwartz called an "impassioned plea" to Universal producer Marc Platt to realize Schwartz's own intended adaptation. Persuaded, Platt signed on as joint producer of the project with Universal and David Stone. The novel, described as a political, social, and ethical commentary on the nature of 

Question: Who is the author of Wicked?
Answer: Winnie Holzman.