Question: Brisingr is the third novel in the "Inheritance Cycle", is a young adult tetralogy of high fantasy novels written by which American author?

Context paragraphs:
The Wheel of Time: The Wheel of Time is a series of high fantasy novels written by American author James Oliver Rigney, Jr. under his pen name of Robert Jordan.  Originally planned as a six-book series, "The Wheel of Time" spanned fourteen volumes, in addition to a prequel novel and a companion book.  Jordan began writing the first volume, "The Eye of the World", in 1984, and it was published in January, 1990.

Lloyd Alexander: Lloyd Chudley Alexander (January 30, 1924 – May 17, 2007) was an American author of more than forty books, primarily fantasy novels for children and young adults.  His most famous work is "The Chronicles of Prydain", a series of five high fantasy novels whose conclusion, "The High King", was awarded the 1969 Newbery Medal for excellence in American children's literature.  He won U.S. National Book Awards in 1971 and 1982.

Patricia Geary: Patricia Geary is an American author.  After writing two borderline fantasy novels, "Living in Ether" (1982) and "Strange Toys" (1987), the latter of which won the Philip K. Dick Award, she found it difficult to sell her third novel as she had a reputation primarily as a fantasy author , and returned to teaching (she teaches creative writing at the University of Redlands).  Her third novel, "The Other Canyon", was published in 2002 by Gorsky Press, and another, "Guru Cigarettes", in 2005.

Inheritance Cycle: The Inheritance Cycle is a young adult tetralogy of high fantasy novels written by American author Christopher Paolini.  Set in the fictional world of Alagaësia ( ), the novels focus on the adventures of a teenage boy named Eragon and his dragon, Saphira, as they struggle to overthrow the evil king Galbatorix.  The series was originally intended to be a trilogy (named the "Inheritance Trilogy") until Paolini announced on October 30, 2007, while working on the third novel, that he believed the story was too complex to conclude in just three books.

The Reckoners: The Reckoners is a trilogy of young adult fantasy novels written by American author Brandon Sanderson.  The series consists of "Steelheart" (2013), "Firefight" (2015), and "Calamity" (2016).  The series depicts a post-apocalyptic world in which the appearance of an orbiting object has given random people superhuman powers in apparent defiance of known physical laws, turning them into "Epics".  These powers have impelled most of them to prey upon or enslave the rest of humanity, causing the collapse of traditional governments.  One young man orphaned by a High Epic joins an elite underground resistance movement.

Suzanne Weyn: Suzanne Weyn (born July 7, 1955, Long Island, New York) is an American author.  She primarily writes children's and young adult science fiction and fantasy novels. and has written over fifty novels and short stories.  She is best known for "The Bar Code Tattoo", "The Bar Code Rebellion" and "The Bar Code Prophecy".  "The Bar Code Tattoo" has been translated into German, and in 2007 was nominated for the Jugendliteraturpreis for youth literature given by the German government.  It was a 2007 Nevada Library nominee for Young Adult literature and American Library Association 2005 Quick Pick for Reluctant Young Adult Readers.

Christopher Paolini: Christopher James Paolini (born November 17, 1983, Los Angeles, California) is an American author.  He is the author of the "Inheritance Cycle", which consists of the books "Eragon", "Eldest", "Brisingr" and "Inheritance".  He currently lives in Paradise Valley, Montana, where he wrote his first book.

Andre Norton Award: The Andre Norton Award for Young Adult Science Fiction and Fantasy is an annual award presented by the Science Fiction and Fantasy Writers of America (SFWA) to the author of the best young adult or middle grade science fiction or fantasy book published in the United States in the preceding year.  It is named to honor prolific science fiction and fantasy author Andre Norton (1912–2005), and it was established by then SFWA president Catherine Asaro and the SFWA Young Adult Fiction committee and announced on February 20, 2005.  Any published young adult or middle grade science fiction or fantasy novel is eligible for the prize, including graphic novels.  There is no limit on word count.  The award is presented along with the Nebula Awards and follows the same rules for nominations and voting; as the awards are separate, works may be simultaneously nominated for both the Andre Norton award and a Nebula Award.

The Chronicles of Thomas Covenant: The Chronicles of Thomas Covenant is a series of ten high fantasy novels written by American author Stephen R. Donaldson.  The series began as a trilogy, entitled "The Chronicles of Thomas Covenant, the Unbeliever".  This was followed by another trilogy, "The Second Chronicles of Thomas Covenant", and finally a tetralogy, "The Last Chronicles of Thomas Covenant".

Brisingr: Brisingr is the third novel in the "Inheritance Cycle" by Christopher Paolini.  It was released on September 20, 2008.  Originally, Paolini intended to conclude the then "Inheritance Trilogy" in three books, but during writing the third book he decided that the series was too complex to conclude in one book, because the single book would be close to 1,500 pages long.  A deluxe edition of "Brisingr", which includes removed scenes and previously unseen art, was released on October 13, 2009.

Supporting paragraphs: Brisingr Inheritance Cycle
Answer: Christopher Paolini