Question: Are authors David Eddings and Nicholas Christopher both American?

Context paragraphs:
Belgarath the Sorcerer: Belgarath the Sorcerer is a book by David Eddings and Leigh Eddings.

High Hunt: High Hunt is the first published novel of David Eddings, first copyrighted in 1973 by a private publisher, its copyright was renewed in 1993 in New York and then in 1994 by Del Rey books in London.  His first novel and one of only two "mainstream novels" he wrote during his career.  While it is not fantasy as are most of Eddings' other books, it still shares similarities with most of them as the book focuses on the main character maturing, falling in love, and overcoming personal tragedy.  The story is written from the first person perspective though the eyes of Dan Alders, a soldier back from the Vietnam War and on a hunting trip with his estranged brother Jack and some "friends": Cal, Lou, and Stan.  During the hunt, tensions and old hatreds rise and escalate into open fighting.  The story takes place in the Cascade Mountains, in Washington state U.S.

Nicholas Christopher: Nicholas Christopher (born 1951) is an American novelist, poet and critic, the author of sixteen books: six novels, eight volumes of poetry, a critical study of film noir, and a novel for children.

The Dreamers (novel series): The Dreamers is the title of a fantasy series by David Eddings and his wife Leigh Eddings.  The story revolves around four beings known as The Elder Gods residing in the land of Dhrall: Dahlaine of the North, Veltan of the South, Zelana of the West and Aracia of the East.  They must recruit the help of outlanders to destroy the fiendish Vlagh and prevent its attempt at world conquest.  The Vlagh is a creature whose more remarkable power is the ability to consciously direct the evolution of its minions, adapting them to the situation as required (the evolution is not instantaneous, but it takes months or even just days, as it is seen in the second book, "The Treasured One").  Most of Vlagh's creations are vaguely insect-like, venomous and violent, although some creatures have been bred human-like enough to pass as humans (and are used as spies).  The creatures also share an Overmind, through which each of them knows and sees what the others do.  Despite these major advantages, the Vlagh and the creatures of the Vlagh are not intelligent.  They can't even understand the meaning of death which causes many defeats early on but as they fight more they begin to avoid simple traps like arrows and poisoned spikes that the protagonists use.  As the Vlagh realizes this, the heroes have already designed new traps and strategies to confuse their enemy.  However, the Elder Gods are not permitted to use their powers to kill, but the young Dreamers, infant forms of the Younger Gods: Eleria (originally Balacenia), Yaltar (originally Vash), Lillabeth (originally Enalla) and Ashad (originally Dakas), can use the powers of their dreams to foresee visions of the future as a warning to an attack and cause great natural disasters capable of mass destruction and killing.

Leigh Eddings: Leigh Eddings (30 September 1937 – 28 February 2007; née Judith Leigh Schall), was the wife of David Eddings and co-author of many of his later works and uncredited co-author of his early works, and married him 27 October 1962.

The Tamuli: The Tamuli is a series of fantasy novels by American writer David Eddings.  The series consists of three volumes:

David Eddings: David Eddings (July 7, 1931 – June 2, 2009) was an American fantasy writer.  With his wife Leigh, he authored several best-selling epic fantasy novel series, including "The Belgariad" (1982–84), "The Malloreon" (1987–91), "The Elenium" (1989–91), "The Tamuli" (1992–94), and "The Dreamers" (2003–06).

The Elenium: The Elenium is a series of fantasy novels by American writer David Eddings.  The series consists of three volumes:

David Eddings bibliography: This complete list of works by American fantasy author David Eddings.

The Rivan Codex: The Rivan Codex is a collection of background material to the Belgariad and Malloreon fantasy saga by David and Leigh Eddings.  It consists of two bodies of material used in writing the novels, one for each series, with three informal essays by David Eddings. " Belgarath the Sorcerer" and "Polgara the Sorceress" do not have dedicated sections, but are referred to in the Eddings' discussions, and drew on the material of the first ten books.  In particular, one text presented in the background to the Belgariad forms the basis for the first chapter of "Belgarath the Sorcerer".

Supporting paragraphs: David Eddings Nicholas Christopher
Answer: yes