Question: Are William H. Gass and Hilary Mantel of the same nationality?

Context articles: The Mirror and the Light
Kidnapped (novel)
William H. Gass
Hilary Mantel
Eight Months on Ghazzah Street
Every Day is Mother's Day
Bring Up the Bodies
Wolf Hall
Peter Carey (novelist)
James Scudamore (author)

The Mirror and the Light is an upcoming historical novel by Hilary Mantel, the final part of a planned trilogy (including "Wolf Hall" and "Bring Up the Bodies") charting the rise and fall of Thomas Cromwell, the powerful minister in the court of King Henry VIII.
Kidnapped is a historical fiction adventure novel by Scottish author Robert Louis Stevenson, written as a boys' novel and first published in the magazine "Young Folks" from May to July 1886.
 The novel has attracted the praise and admiration of writers as diverse as Henry James, Jorge Luis Borges, and Hilary Mantel.
 A sequel, "Catriona", was published in 1893.
William Howard Gass (born July 30, 1924) is an American novelist, short-story writer, essayist, critic, and former philosophy professor.
 He has written three novels, three collections of short stories, a collection of novellas, and seven volumes of essays, three of which have won National Book Critics Circle Award prizes and one of which, "A Temple of Texts" (2006), won the Truman Capote Award for Literary Criticism.
 His 1995 novel "The Tunnel" received the American Book Award.
 His 2013 novel "Middle C" won the 2015 William Dean Howells Medal.
Dame Hilary Mary Mantel, {'1': ", '2': ", '3': ", '4': "} ( ; born Thompson, 6 July 1952), is an English writer whose work includes personal memoirs, short stories, and historical fiction.
Eight Months on Ghazzah Street (1988) is the third novel by English author Hilary Mantel, who won the Man Booker Prize in 2009.
 It concerns the Englishwoman Frances Shore, who moves to Jeddah, Saudi Arabia to live with her husband, an engineer.
Every Day is Mother's Day is the first novel by British author Hilary Mantel, published in 1985 by Chatto and Windus.
 It was inspired in part by Hilary Mantel's own experiences as a social work assistant at a geriatric hospital which involved visits to patients in the community and access to case notes, the loss of which play an important part of the novel.
Bring Up the Bodies is a historical novel by Hilary Mantel and sequel to her award-winning "Wolf Hall".
 It is the second part of a planned trilogy charting the rise and fall of Thomas Cromwell, the powerful minister in the court of King Henry VIII.
 "Bring Up the Bodies" won the 2012 Man Booker Prize and the 2012 Costa Book of the Year.
 It is to be followed by "The Mirror and the Light".
Wolf Hall (2009) is a historical novel by English author Hilary Mantel, published by Fourth Estate, named after the Seymour family seat of Wolfhall or Wulfhall in Wiltshire.
 Set in the period from 1500 to 1535, "Wolf Hall" is a sympathetic fictionalised biography documenting the rapid rise to power of Thomas Cromwell in the court of Henry VIII through to the death of Sir Thomas More.
 The novel won both the Man Booker Prize and the National Book Critics Circle Award.
 In 2012, "The Observer" named it as one of "The 10 best historical novels".
Peter Philip Carey AO (born 7 May 1943) is an Australian novelist.
 Carey has won the Miles Franklin Award three times and is frequently named as Australia's next contender for the Nobel Prize in Literature.
 Carey is one of only four writers to have won the Booker Prize twice—the others being J. G. Farrell, J. M. Coetzee and Hilary Mantel.
 Carey won his first Booker Prize in 1988 for "Oscar and Lucinda", and won for the second time in 2001 with "True History of the Kelly Gang".
 In May 2008 he was nominated for the Best of the Booker Prize.
Scudamore's first novel "The Amnesia Clinic" won the 2007 Somerset Maugham Award and was shortlisted for the Costa First Novel Award, the Commonwealth Writers' Prize, the Glen Dimplex Award and the Dylan Thomas Prize.
 It was described by Hilary Mantel as "A wonderful debut - witty, polished, fluent and effortlessly entertaining" and by the judges of the Costa Award as a "delightful book ... full of tall tales and fantasy".