Question: Gregor Clegane appeared in what novel that  is the fifth novel in the series, "A song of Ice and Fire".

Context articles: Lucky Starr and the Moons of Jupiter
N.E.R.D.S.
Persistence of Memory
The Dark Tower V: Wolves of the Calla
Ascending
Gregor Clegane
Gregor and the Code of Claw
Hafþór Júlíus Björnsson
Andrew Murray Scott
A Dance with Dragons

Lucky Starr and the Moons of Jupiter is the fifth novel in the "Lucky Starr" series, six juvenile science fiction novels by Isaac Asimov that originally appeared under the pseudonym Paul French.
 The novel was first published by Doubleday & Company in August 1957.
 It is the only novel by Asimov set in the Jovian system.
N.E.R.D.S is a children's thriller humorous series written by Michael Buckley and illustrated by Ethen Beavers.
 The first novel is called "N.E.R.D.S.: National Espionage, Rescue, and Defense Society" and it is from Jackson "Braceface" Jones' point of view.
 The second novel is called "N.E.R.D.S.: M is for Mama's Boy" and is from Duncan "Gluestick" Dewey's point of view.
 The third novel is called "N.E.R.D.S.: The Cheerleaders of Doom", which is told from Matilda "Wheezer" Choi's point of view.
 The fourth novel is called "N.E.R.D.S.: The Villain Virus", which is told from Julio "Flinch" Escala's point of view.
 The fifth novel is called "N.E.R.D.S.: Attack of the Bullies", which is told from Ruby "Pufferfish" Peet's point of view.
 An animated feature film based on the series is in development at Elton John's Rocket Pictures.
Persistence of Memory is the tenth novel by American teen author Amelia Atwater-Rhodes and is the fifth novel in her Den of Shadows series.
 Published on December 9, 2008 the novel tells the story of Erin Misrahe and her struggles with her alter-ego Shevaun, who is in fact a vampire with whom Erin has a link.
 The novel also mentions a character from Atwater-Rhodes's previous novel, "In the Forests of the Night" (1999), Alexander, the brother of the protagonist, Risika.
 The poem by Edgar Allan Poe entitled "A Dream Within a Dream" is featured in the novel.
Wolves of the Calla is the fifth novel in Stephen King's "The Dark Tower" series.
 This book continues the story of Roland Deschain, Eddie Dean, Susannah Dean, Jake Chambers, and Oy as they make their way toward the Dark Tower.
 The subtitle of this novel is "Resistance".
 Prior to the novel's publication, two excerpts were published: "Calla Bryn Sturgis" was published in 2001 on Stephen King's official site, and "The Tale of Gray Dick" was published in 2003 in "McSweeney's Mammoth Treasury of Thrilling Tales".
 Both excerpts were incorporated in revised form into the novel.
 "Wolves of the Calla" was nominated for the Locus Award for Best Fantasy Novel in 2004.
Ascending is a science fiction novel by the Canadian writer James Alan Gardner, published in 2001 by HarperCollins Publishers under its various imprints.
 It is the fifth novel in Gardner's "League of Peoples" series.
 It is a direct sequel to the first novel in the series, "Expendable", in that it picks up the dual story of Festina Ramos, Explorer turned admiral, and the transparent glass woman Oar, where the earlier novel left off.
Gregor Clegane, nicknamed "The Mountain That Rides" or simply "The Mountain", is a fictional character in the "A Song of Ice and Fire" series of fantasy novels by American author George R. R. Martin, and its television adaptation "Game of Thrones".
 In the books, the character is initially introduced in 1996's "A Game of Thrones".
 He subsequently appeared in "A Clash of Kings" (1998), "A Storm of Swords" (2000) and in "A Dance with Dragons" (2011).
Gregor and the Code of Claw is a children's novel by author Suzanne Collins, best known for her "Hunger Games" trilogy.
 It is the fifth and final book of "The Underland Chronicles", and was published in 2007.
 Scholastic has rated the book's "grade level equivalent" as 4.5 and the book's lexile score as 730L, making it reading-level-appropriate for the average fourth to sixth grader.
 The novel has been praised especially as a conclusion to "The Underland Chronicles".
 In its description of the novel, as part of its "Recommended Books" award, the CCBC states, "Although Gregor and the Code of Claw works as a stand-alone story, readers will want to start with book one and work their way through to this final volume."
 An audiobook version was released in 2008, read by Paul Boehmer.
Hafþór Júlíus "Thor" Björnsson (] ; also Hafthor Julius Bjornsson, born November 26, 1988) is an Icelandic professional strongman, actor, and former professional basketball player.
 He plays Ser Gregor "The Mountain" Clegane in the HBO series "Game of Thrones".
Andrew Murray Scott (born 1955 in Aberdeen, Scotland) is a novelist, poet and non-fiction book writer.
 His first novel, "Tumulus", appeared in 2000, as the winner of the inaugural Dundee International Book Prize for unpublished novels, against 82 other manuscripts, winning the author £6,000 plus a publishing deal.
 A second novel, "Estuary Blue", appeared in 2001 from the same publisher, Polygon, of Edinburgh.
 In 2007, a third novel, "The Mushroom Club" appeared and Scott's fourth novel, "The Big J" published by Steve Savage Publishers Ltd, was published in April 2008 while a fifth novel "In A Dead Man's Jacket", was published as an ebook for both Kindle and Kobo readers in 2012.
A Dance with Dragons is the fifth of seven planned novels in the epic fantasy series "A Song of Ice and Fire" by American author George R. R. Martin.
 In some areas the paperback edition was published in two parts titled "Dreams and Dust" and "After the Feast".
 It was the first novel in the series to be published following the commencement of the HBO series adaptation, "Game of Thrones", and runs to 1,040 pages.