Orson Scott Card (born August 24, 1951) is an American novelist, critic, public speaker, essayist, and columnist.
 He writes in several genres but is known best for science fiction.
 His novel "Ender's Game" (1985) and its sequel "Speaker for the Dead" (1986) both won Hugo and Nebula Awards, making Card the only author to win both science fiction's top U.S. prizes in consecutive years.
 A feature film adaptation of "Ender's Game", which Card co-produced, was released in late October 2013 in Europe and on November 1, 2013, in North America.
Robert Buettner is an American author of military science fiction novels.
 He is a former Military Intelligence Officer, National Science Foundation Fellow in Paleontology and has been published in the field of Natural Resources Law.
 He has written five volumes of the "Jason Wander" series, three volumes of the "Orphan's Legacy" series, the stand-alone novel "The Golden Gate", several short stories, and the afterword to an anthology of stories by the late Robert Heinlein.
 Buettner currently lives in Georgia.
Jeff P. Iorg (born October 9, 1958) is an American author, pastor, church planter, teacher, speaker, and current president of Gateway Seminary (formerly Golden Gate Baptist Theological Seminary), an entity of the Southern Baptist Convention with five campuses located in the Western United States.
The Gate Thief is a fantasy novel by Orson Scott Card.
 It is the second novel in the Mither Mages trilogy.
The Hunters is a book series written by Chris Kuzneski, an American author.
 The series follows the adventures of a team of renegades – an ex-military leader, a historian, a computer whiz, a weapons expert and a thief – financed by a billionaire philanthropist who are tasked with finding the world's most legendary treasures.
 The first novel in the series, "The Hunters", is currently being turned into a motion picture, directed by John Moore with the screenplay being adapted by Robert Mark Kamen.
 The series also ties in with Kuzneski's other series, Payne & Jones, by featuring the character Petr Ulster, a historian and curator of the Ulster Archives in Küsendorf, Switzerland, and mentioning a number of minor characters and events from the Payne & Jones universe.
 The third book in the series, "The Prisoner's Gold", won the Thriller Award for the 2016 Book of the Year at a gala hosted by the International Thriller Writers (ITW) in New York City on July 9, 2016.
The Lightning Thief is a 2005 fantasy-adventure novel based on Greek mythology, the first young adult novel written by American author Rick Riordan.
 It is the first novel in the "Percy Jackson & the Olympians" series, which charts the adventures of modern-day twelve-year-old Percy Jackson as he discovers he is a demigod, the son of a mortal woman and the Greek god Poseidon.
 Percy and his friends Annabeth Chase and Grover Underwood go on a quest to prevent a war between the gods Zeus, Poseidon, and Hades.
Jeff Edwards (born 1959) is an American author of bestselling military thrillers.
 He has published an assortment of articles and opinion columns, mostly on Military.com, and in various military newspapers.
 The majority of his published work, fiction and non-fiction, pertains to the U.S. military.
 Collectively, his novels have won the "Admiral Nimitz Award for Outstanding Naval Fiction" from the "Military Writer's Society of America", the "American Author Medal" from the American Author's Association, the "Clive Cussler Grandmaster Award for Adventure Writing", the "Reader’s Choice Award", and the "Silver Medal for Military/Wartime Fiction" from the Independent Publishers of America.
Theodore Weesner (July 31, 1935 – June 25, 2015) was an American author.
 Born in Flint, Michigan, he is best known for his coming-of-age debut novel, "The Car Thief" (1972).
 The book, published by Random House, is in 439 libraries, according to WorldCat
The Gold Coast is a 1990 novel by American author, Nelson DeMille.
 It introduces DeMille’s recurring character, John Sutter. "
The Gate House" is the sequel to "The Gold Coast".
Jennifer Anne Nielsen (born 10 July 1971) is an American author known primarily for young adult fiction.
 Her works include the "Ascendance Trilogy", "Behind Enemy Lines" (one of the books in the Infinity Ring series), "The Mark of the Thief", "A Night Divided", and the "Underworld Chronicles".
 Nielsen was born and raised in northern Utah and completed her first full manuscript at the age of 11.
 However, it was abandoned after being turned down by a locksmith for information due to her age.
 She published "Elliot and the Goblin War", the first "Underworld Chronicles" book, in 2010 and has continued publishing novels since.

Question: What American author was the writer of "the Gate Thief"?
Answer: Orson Scott Card