Question: In what year was the author of the book series which had the character Opal Koboi born?

Context paragraphs:
Foaly: Foaly is a fictional character in the Artemis Fowl series written by Eoin Colfer.  He is the technical consultant to the Lower Elements Police (LEP).  He is the most intelligent centaur on and under the Earth, considers himself to be an unappreciated genius, and is the inventor of most of the advanced technology possessed by the fairy world, rivaled only by Opal Koboi.

Maria V. Snyder: Maria V. Snyder is an American fantasy author best known for her "Study Series".  Her first novel, "Poison Study", was published on October 2005, and won the 2006 Compton Crook Award for Best First Novel.  the next two books in the series are "Magic Study" and "Fire Study".  Snyder then released another trilogy of books, the "Glass" series, following the character Opal Cowan from the "Study Series".  The books in the series are "Storm Glass", "Sea Glass" and "Spy Glass" respectively.  On 24 February, Snyder went back to the main characters of the "Study Series" and released the first book of he next trilogy, the "Soulfinder Series", the first book of which is "Shadow Study".  Aside from writing, her interests include "traveling, photography, making jewelry, and volleyball."

Artemis Fowl: The Opal Deception: Artemis Fowl: The Opal Deception (known as Artemis Fowl and the Opal Deception in Europe) is a teen fantasy novel published in 2005, the 4th book in the Artemis Fowl series by the Irish author Eoin Colfer.  Preceded by " "and followed by "", it is centred on the brilliant pixie Opal Koboi's second try at rebellion (after her was a failure) and Artemis Fowl II and his fairy comrades' efforts to stop her.  Critical reception was mixed, with some reviews praising the book but others pointing out confusion and poor writing.  Artemis Fowl is not seen in the book as much as Opal Koboi.

Amethyst, Princess of Gemworld: Amethyst: Princess of Gemworld is a comic book series published by DC Comics in the 1980s.  The series tells the story of a teenage girl named Amy Winston who discovers that she is the orphaned princess of the magical Gemworld.  Amy learns that an evil ruler called Dark Opal is out to destroy her and travels to Gemworld to overthrow him.

Eoin Colfer: Eoin Colfer ( ; born 14 May 1965) is an Irish author of children's books.  He worked as a primary school teacher before he became a full-time writer.  He is best known for being the author of the "Artemis Fowl" series.  In September 2008, Colfer was commissioned to write the sixth installment of the "Hitchhiker's Guide to the Galaxy" series, entitled "And Another Thing ...", which was published in October 2009.

Alice-Miranda: Alice-Miranda is a fictional main character in a children's book series of the same name.  The Alice-Miranda book series chronicles the adventures of a young student at the Winchesterfield-Downsfordvale Academy for Proper Young Ladies.  "Alice-Miranda At School" is the first book in the series and was published in 2010.  The series was created by Australian author Jacqueline Harvey, a teacher and former Deputy Head of Junior School and Director of Development at Abbotsleigh.  Harvey created the Alice-Miranda series based on her teaching experiences at boarding schools.  The series is sold throughout Australia, United States, United Kingdom, Indonesia, Turkey, Hungary and Brazil.

Opal Koboi: Opal Koboi is a fictional character from the Artemis Fowl series by Eoin Colfer.  After the character's introduction in in the series as a supporting antagonist, Colfer again used Koboi as the main antagonist of the fourth, sixth, and eighth books in the series, giving her the status of archenemy to Artemis Fowl II.

Pobby and Dingan: Pobby and Dingan is a novella by English author Ben Rice, which first appeared in issue 70 of "Granta" in Summer 2000 and published in book form later that year.  It was joint winner of the 2001 Somerset Maugham Award and shortlisted for the John Llewellyn Rhys Prize.  It has been made into the 2006 film "Opal Dream" and a 2010 play for children by Catherine Wheels Theatre Company.

K. A. Applegate: Katherine Alice Applegate (born October 9, 1956 in Ann Arbor, Michigan) is an American young adult and children's fiction writer, best known as the author of the "Animorphs", "Remnants", "Everworld", and other book series.  She won the 2013 Newbery Medal for her 2012 children's novel "The One and Only Ivan".  Applegate's most popular books are science fiction, fantasy, and adventure novels.  She won the Best New Children's Book Series Award in 1997 in "Publishers Weekly".  Her book "Home of the Brave" has won two awards.  She also wrote a chapter book series in 2008-9 called "Roscoe Riley Rules".

Eric Northman: Eric Northman is a fictional character in "The Southern Vampire Mysteries," a series of thirteen books written by "New York Times" bestselling author Charlaine Harris.  He is a vampire, slightly over one thousand years old, and is first introduced in the first novel, "Dead Until Dark" and appears in all subsequent novels.  Since the book series is told from the first person perspective of Sookie Stackhouse, what readers perceive of his character is influenced by what Sookie comprehends.  HBO's television series "True Blood" is based on this book series and the character of Eric Northman is portrayed somewhat differently.  A list of "True Blood" characters has a detailed description of Eric's character from the TV show.

Supporting paragraphs: Opal Koboi Eoin Colfer
Answer: 1965