Question: Zachary Grey is a fictional character in the young adult novels by an author that died in what year?
Context: Eliot Schrefer (born November 25, 1978), is an American author of both Adult and Young Adult fiction, and a two-time finalist for the National Book Award in Young People's Literature.  Schrefer's first novel "Glamorous Disasters," was published by Simon & Schuster in 2006.  He is most known for his young adult novels "Endangered" (2012) and "Threatened" (2014), which are survival stories featuring young people and great apes.  He is currently on the faculty of the Creative Writing MFA Program at Fairleigh Dickinson University. Allen Zadoff is an American author of young adult fiction.  He is mainly known for his young adult novels including "The Unknown Assassin" series.  His novel "Food, Girls, and Other Things I Can’t Have" was awarded the 2010 Sid Fleischman Humor Award from the Society of Children's Book Writers and Illustrators.  and was included in Popular Young Adult Paperbacks of 2012 by YALSA.  It has also been optioned for a feature film.  His other novels for young adults include "My Life, the Theater, and Other Tragedies" and "Since You Left Me".  He is also the author of The Unknown Assassin books from Little Brown Books for Young Readers. Malcolm Joseph Bosse (1926–2002) was an American author of both young adult and adult novels.  His novels are often set in Asia, and have been praised for their cultural and historical information relating to the character's adventures.  Bosse mostly wrote historical fiction novels after the publication of "The Warlord," which became a best-seller.  He also won the Deutscher Jugendliteraturpreis in 1983. Rainbow Rowell (born February 24, 1973) is an American author of young adult and adult contemporary novels.  Her young adult novels "Eleanor & Park" (2013), "Fangirl" (2013) and "Carry On" (2015) have been subjects of critical acclaim. Paul Lewis Anderson (1880–1956) was an American photographer and author who wrote five young adult historical fiction novels focusing on ancient Rome and two young adult novels about life in a New England boys' prep school.  He also wrote numerous outdoors-oriented short stories for magazines such as "Boys' Life" and "The Outdoorsman." The Chocolate War is a young adult novel by American author Robert Cormier.  First published in 1974, it was adapted into a film in 1988.  Although it received mixed reviews at the time of its publication, some reviewers have argued it is one of the best young adult novels of all time.  Set at a fictional Catholic high school, the story depicts a secret student organization's manipulation of the student body, which descends into cruel and ugly mob mentality against a lone, non-conforming student.  Because of the novel's language, the concept of a high school secret society using intimidation to enforce the cultural norms of the school and various characters' sexual ponderings, it has been embroiled in censorship controversies and appeared as third on the American Library Association's list of the "Top 100 Banned/Challenged Books in 2000–2009."  A sequel was published in 1985 called "Beyond the Chocolate War". Zachary Grey is a fictional character in the young adult novels of Madeleine L'Engle.  He appears in four novels, and is mentioned in at least one more. Clark Kent is a fictional character on the television series "Smallville".  The character of Clark Kent, first created for comic books by Jerry Siegel and Joe Shuster in 1938 as the alternate identity of Superman, was adapted to television in 2001 by Alfred Gough and Miles Millar.  This is the fourth time the character has been adapted to a live-action television series.  Clark Kent has been played continually by Tom Welling, with various other actors portraying Clark as a child.  The character has also appeared in various literature based on the "Smallville" series, all of which are completely independent of the television episodes.  As of 2011, "Smallville"' s Clark Kent has appeared in eighteen young adult novels. Madeleine L'Engle ( ; Camp, November 29, 1918 – September 6, 2007 ) was an American writer who wrote young adult fiction, including "A Wrinkle in Time" and its sequels: "A Wind in the Door", "A Swiftly Tilting Planet", "Many Waters" and "An Acceptable Time".  Her works reflect both her Christian faith and her strong interest in science. Melissa de la Cruz (born 1971) is a Filipina American author known for her work in young adult fiction.  She has written several series of young adult novels, including the "Au Pair" series and the "Blue Bloods" series, and a contemporary fiction series following "The Beauchamp Family", as well as a number of stand-alone novels.
Answer: 2007