Kaos (originally "Chaos" in the US) is a 1984 Italian drama film directed by Paolo and Vittorio Taviani based on short stories by Luigi Pirandello (1867–1936).
 The film's title is after Pirandello's explanation of the local name "Càvusu" of the woods near his birthplace in the neighborhood of Girgenti (Agrigento), on the southern coast of Sicily, as deriving from the ancient Greek word "kaos".
Harlan Coben (born January 4, 1962) is an American writer of mystery novels and thrillers.
 The plots of his novels often involve the resurfacing of unresolved or misinterpreted events in the past, murders, or fatal accidents and have multiple twists.
 Among his novels are two series, each involving the same protagonist set in and around New York and New Jersey, and some characters appear in both.
Six Characters in Search of an Author (Italian: "Sei personaggi in cerca d'autore" ] ) is an Italian play by Luigi Pirandello, written and first performed in 1921.
 An absurdist metatheatrical play about the relationship among authors, their characters, and theatre practitioners, it premiered at the Teatro Valle in Rome to a mixed reception, with shouts from the audience of "Manicomio!"
 ("Madhouse!")
 and "Incommensurabile!"
 ("Incommensurable!")
, a reference to the play's illogical progression.
 Reception improved at subsequent performances, especially after Pirandello provided for the play's third edition, published in 1925, a foreword clarifying its structure and ideas.
Luigi Pirandello (] ; Girgenti,today known as Agrigento, 28 June 1867 – Rome 10 December 1936) was an Italian dramatist, novelist, poet and short story writer whose greatest contributions were his plays.
 He was awarded the 1934 Nobel Prize in Literature for "his almost magical power to turn psychological analysis into good theatre."
One, No One and One Hundred Thousand (Italian: "Uno, Nessuno e Centomila" ] ) is a 1926 novel by the Italian writer Luigi Pirandello.
 The novel had a rather long and difficult period of gestation.
 Pirandello began writing it in 1909.
 In an autobiographical letter, published in 1924, the author refers to this work as the "...bitterest of all, profoundly humoristic, about the decomposition of life:
Liolà (] ) is an Italian stage play written by Luigi Pirandello, which takes place in 19th century Sicily.
 The title character is a middle-aged single father by choice.
 He has three young boys, each by a different mother.
 Liolà is a free-spirit who wanders from town to town, looking to connect with nature, and to create children without having any ties to the mother.
 He tries to sell one of his boys to Zio Simone, a crabby elderly man, who becomes offended by the offer.
 He then has an encounter with Mita, a former lover, who tells him that he is the father of her unborn child.
 Pirandello immortalizes Liolà as an ideal father, and in certain scenes in the play, Liolà shows a lot of love and affection to his children.
Fausto Pirandello (17 June 1899 – 30 November 1975) was an Italian painter belonging to the modern movement of the "Scuola romana (Roman School)".
 He was the son of Nobel laureate Luigi Pirandello.
Hold Tight is a Harlan Coben 2008 stand-alone thriller dealing with problems of parental controls, teenage suicide, children independence and abuse of prescribed drugs.
 It features several characters that are equally important.
 It was moderately well received by the critics.
 It debuted simultaneously as a No. 1 "New York Times" best seller and a Times of London best seller.
Right You Are (If You Think So) (Italian: "Così è (se vi pare)" ] , also translated as "It Is So, (If You Think So)") is an Italian drama by Luigi Pirandello.
 The play is based on Pirandello's novel "La signora Frola e il signor Ponza, suo genero".
L'Esclusa (] ) (English: The Excluded Woman ) was Luigi Pirandello's first novel.
 Written in 1893 with the title "Marta Ajala", it was originally published in episodes in the Roman newspaper "La Tribuna" from June 29 to August 16, 1901, with the definitive title "L'Esclusa".
 It was finally republished in single volume in 1908 in Milan by the "Fratelli Treves".
 In this edition, a letter dedicated to Luigi Capuana was also published in which the author expressed his concerns that the "humoristic foundation" of the novel might have escaped those who had read the newspaper version.
 He also points out that "every will is excluded, even though the characters are left with the full illusion that they are acting voluntarily."
 He added that "nature, without any apparent order, bristling with contradictions is often extremely remote from the work of art..." which almost always arbitrarily harmonizes and rationalizes reality.

Question: What job did both Luigi Pirandello and Harlan Coben hold?
Answer: writer