Question: What American fantasy writer's wife uthored several best-selling epic fantasy novel series, including "The Belgariad" , "The Malloreon" , "The Elenium" , "The Tamuli" , and "The Dreamers", David Eddings, or  John Crowley?
Context: The Elene Church is a fictional church, the official church of the continent of Eosia (excluding Zemoch) in David Eddings' series "The Elenium" and "The Tamuli".  The Elene Church is based heavily upon the Roman Catholic Church in real life. Below is a list of fictional characters appearing in "The Elenium" and "The Tamuli", fantasy series written by David Eddings. Belgarion (also called Garion) is a fictional character and the chief protagonist in "The Belgariad" and "The Malloreon", two fantasy epics written by David Eddings. This is a list of "The Dreamers" characters. " The Dreamers" is a fantasy epic saga written by 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 Malloreon is a five-part fantasy book series written by David Eddings, which follows "The Belgariad".  The Malloreon is set in the same world as The Belgariad, but expands on several aspects of the setting, especially the eastern continent of Mallorea. Polgara the Sorceress is a fantasy novel by David and Leigh Eddings, and the twelfth in the setting of "The Belgariad", "The Malloreon" and "Belgarath the Sorcerer".  Like "Belgarath", it is presented as a first-person narrative recounting the life of the eponymous character, Polgara, framed by a prologue and epilogue in the third person placing it in context relative to the earlier stories.  The fictional character of Polgara is the (many generations removed) aunt of Belgarion and the daughter of Belgarath. John Crowley (born December 1, 1942) is an American author of fantasy, science fiction and mainstream fiction.  He studied at Indiana University and has a second career as a documentary film writer. 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". 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.
Answer: David Eddings