Question: Eleanor Worthington Cox is best known for her role in this musical based on a children's novel written by who
Context: The Mystery of Edwin Drood (or Drood) is a musical based on the unfinished Charles Dickens novel "The Mystery of Edwin Drood".  It is written by Rupert Holmes, and was the first Broadway musical with multiple endings (determined by audience vote).  Holmes received Tony Awards for Best Book and Best Original Score.  The musical won five Tony Awards out of eleven nominations, including Best Musical and Best Leading Actor. Matilda the Musical is a stage musical based on the 1988 children's novel of the same name by Roald Dahl.  It was adapted by Dennis Kelly, with music and lyrics by Tim Minchin.  The musical's narrative centres on Matilda, a precocious 5-year-old girl with the gift of telekinesis, who loves reading, overcomes obstacles caused by her family and school, and helps her teacher to reclaim her life.  After a twelve-week trial run staged by the Royal Shakespeare Company (RSC) at Stratford-upon-Avon from November 2010 to January 2011, it received its West End premiere on 24 November 2011 at the Cambridge Theatre and its Broadway premiere on 11 April 2013 at the Shubert Theatre. The Wonderful Flight to the Mushroom Planet is a children's science fiction novel written by Eleanor Cameron, illustrated by Robert Henneberger, and published by Little, Brown in 1954.  It is set in Pacific Grove, California, and on Basidium, a tiny habitable moon of Earth, invisible from the planet in its orbit 50,000 miles away.  The "Mushroom Planet", visited by the protagonists David Topman and Chuck Masterson, is covered in various types of mushrooms and is populated by little green people who are in a state of distress. Eleanor Worthington Cox (born 21 June 2001) is a British child actress from Merseyside most known for portraying Matilda Wormwood in "Matilda the Musical" for which she won a Laurence Olivier Award for Best Actress, and Janet Hodgson in "The Enfield Haunting", for which she received a British Academy Television Award nomination.  Worthington Cox is the youngest recipient of an Olivier Award at the age of 10. Arne Lie (September 25, 1921 – January 22, 1982) was a Norwegian actor best known for the voice of Paul Cox in the radio drama "God aften, mitt navn er Cox" (Good Evening, My Name is Cox), broadcast by the Norwegian Broadcasting Corporation's Radio Theater department, and for his role as Instructor Brandt in the Norwegian "Stompa" films and radio dramas, based on the Jennings novels. Sophia Elsie Kiely (born 2000) is an English Olivier Award winning child actress who played the titular role of Matilda in "Matilda the Musical".  Kiely shared the role with Cleo Demetriou, Kerry Ingram and Eleanor Worthington Cox. Sadako and the Thousand Paper Cranes is a children's historical novel written by Canadian-American author Eleanor Coerr and published in 1977.  It is set in Japan after World War II. Tuck Everlasting is a musical based upon the American children's novel "Tuck Everlasting" by Natalie Babbitt.  It features music by Chris Miller, lyrics by Nathan Tysen and a book by Claudia Shear and Tim Federle, with direction and choreography by Casey Nicholaw.  The musical had its premiere at the Alliance Theater in Atlanta, Georgia, in 2015.  It began Broadway previews on March 31, 2016; and opened on April 26, 2016, at the Broadhurst Theatre, in New York City.  The production closed on May 29, 2016, after 39 performances. Dracula: the Musical is a Swedish musical based on the novel "Dracula" by Bram Stoker produced in 2010.  It was originally a theatre production meant for ten performances but due to the massive popularity extra performances were added and the musical was turned into a film, given a limited release on DVD.  The film was put together by editing several performances of the musical and a filming session for closeups.  The musical was written by Lisa Linder and directed by .  Music was composed by Christer Johansson and Jacob Mülrad. Once is a musical based on the 2007 film of the same name by John Carney.  Like the film, music and lyrics were by Glen Hansard and Markéta Irglová, including the Academy Award-winning "Falling Slowly".  The book for the musical was written by Enda Walsh.  The musical premiered at the New York Theatre Workshop in 2011, before transferring to Broadway in 2012.  The production received eleven 2012 Tony Award nominations, and won eight including Best Musical, Best Actor and Best Book.  The musical also won the 2012 Drama Desk Award for Outstanding Musical and the 2013 Grammy Award for Best Musical Theater Album.  It has since spawned a London production, with a North American Tour which started on 1 October 2013.
Answer: Roald Dahl