Question: In what book is a heffalump a fictional character

Context paragraphs:
Heffalump: A Heffalump is a type of fictional elephant in the Winnie the Pooh stories by A. A. Milne.  Heffalumps are mentioned, and only appear, in Pooh and Piglet's dreams in "Winnie-the-Pooh" (1926) and seen again in "The House at Pooh Corner" (1928).  Physically, they resemble elephants; Shepard's illustration shows an Indian elephant.  They are later featured in the animated television series "The New Adventures of Winnie the Pooh" (1988–1991), followed by two animated films in 2005, "Pooh's Heffalump Movie" and "Pooh's Heffalump Halloween Movie".

Faith (Buffy the Vampire Slayer): Faith is a fictional character created by Joss Whedon for the television series "Buffy the Vampire Slayer".  Played by actress Eliza Dushku, Faith was introduced in the third season of "Buffy" and was a focus of that season's overarching plot.  She returned for shorter story arcs on "Buffy" and its spin-off, "Angel".  The character's story is continued in the comic book series "Buffy the Vampire Slayer Season Eight", and she also appears in apocryphal material such as other comic books and novels.  Faith was set to receive her own spin-off television series after the final season of "Buffy", but Eliza Dushku declined the offer, and the series was never made.  The character later co-stars in the 25-issue comic book "Angel & Faith" beginning in August 2011 under the banner of "Buffy the Vampire Slayer Season Nine", the story taking place mostly in London and the surrounding area.  Seven years after the character's creation, Whedon granted her the surname Lehane for a role-playing game and subsequent material.  The last issue of "Season Eight" was the first source officially confirmed to be canon that referred to Faith by her full name.

Snapper Carr: Lucas "Snapper" Carr is a fictional character appearing in American comic books published by DC Comics.  The character, whose fictional nickname is almost always used by other characters in favor of his given name, was created by Gardner Fox (writer) and Mike Sekowsky (penciller), and made his first appearance in "The Brave and the Bold" in February 1960.  From 1960 to 1969, Snapper Carr appeared as a supporting character to the Justice League of America, a superhero team.  The character occasionally appeared in comics featuring the Justice League from 1969 to 1989, when the "Invasion! " limited-series comic book gave him superpowers.  He was associated with a new superhero team, The Blasters, in various comics until 1993, when he lost his powers and became a main character in the "Hourman" comic book.  After the cancellation of "Hourman" in April 2001, he became a main character in the "Young Justice" comic book beginning in December 2001.  "Young Justice" was cancelled in May 2003, and he became associated with the governmental organization Checkmate, a role revealed when the character played a small but important role in the 2007-2008 limited series comic book "52 Aftermath: The Four Horsemen".  The character made major appearances in "Final Crisis: Resist" in December 2008 and "Justice League of America 80-Page Giant" in November 2009.

Dream (comics): Dream is a fictional character appearing in American comic books published by DC Comics' imprint Vertigo.  The character is the protagonist of the comic book series "The Sandman", written by Neil Gaiman.  One of the seven Endless, inconceivably powerful beings older and greater than gods, Dream is both lord and personification of all dreams and stories, all that is not in reality (which, in turn, Dream may define by his existence).  He has taken many names, including Morpheus and Oneiros, and his appearance can change depending on the person who is seeing him.  Dream was named the sixth-greatest comic book character by "Empire Magazine".  He was also named fifteenth in IGN's 100 Top Comic Book Heroes list.

Paddington Bear: Paddington Bear is a fictional character in children's literature.  He first appeared on 13 October 1958 in the children's book "A Bear Called Paddington" and has been featured in more than twenty books written by English author Michael Bond and illustrated by Peggy Fortnum and other artists.  The friendly bear from deepest, darkest Peru—with his old hat, battered suitcase (complete with a secret compartment, enabling it to hold more items than it would appear to), duffel coat and love of marmalade—has become a classic character from English children's literature.  Paddington books have been translated into 30 languages across 70 titles and sold more than 30 million copies worldwide.  A much loved fictional character in British culture, a Paddington Bear soft toy was chosen by British tunnellers as the first item to pass through to their French counterparts when the two sides of the Channel Tunnel were linked in 1994.

Character blogging: Character blogs are a type of blog written as though a fictional character, rather than an actual person, is making the blog post.  There are many character blogs on the Internet, and it has recently become popular among TV show producers as a means of promoting their show.  Sometimes these character blogs are done as a simple means of expression by fans or regular people unaffiliated with any professional media.  In the current decade they have become an outlet for fans of TV show, movie, and comic book characters, to play with and interact with characters ranging from Star Wars and Star Trek to Superman, Spider-Man and even solo characters created by the blogger themselves and placed in one of the many fictional universes found in fiction.

Spawn (comics): Spawn is a fictional character, an antihero that appears in a monthly comic book of the same name published by Image Comics.  Created by Todd McFarlane, the character first appeared in "Spawn" #1 (May 1992).  Spawn was ranked 60th on "Wizard" magazine's list of the Top 200 Comic Book Characters of All Time, 50th on "Empire" magazine's list of The 50 Greatest Comic Book Characters and 36th on IGN's 2011 Top 100 Comic Book Heroes.

Atticus Finch: Atticus Finch is a fictional character in author Harper Lee's Pulitzer Prize winning novel of 1960, "To Kill a Mockingbird".  A preliminary version of the character also appears in the novel "Go Set a Watchman", written in the mid 1950s but not published until 2015.  Atticus is a lawyer and resident of the fictional Maycomb County, Alabama, and the father of Jeremy "Jem" Finch and Jean Louise "Scout" Finch.  Lee based the character on her own father, Amasa Coleman Lee, an Alabama lawyer, who, like Atticus, represented black defendants in a highly publicized criminal trial. " Book Magazine"' s list of "The 100 Best Characters in Fiction Since 1900" names Finch as the seventh best fictional character of 20th-century literature.  In 2003 the American Film Institute voted Atticus Finch, as portrayed in an Academy Award-winning performance by Gregory Peck in the 1962 film adaptation, as the greatest hero of all American cinema.

Eric Northman: Eric Northman is a fictional character in "The Southern Vampire Mysteries," a series of thirteen books written by "New York Times" bestselling author Charlaine Harris.  He is a vampire, slightly over one thousand years old, and is first introduced in the first novel, "Dead Until Dark" and appears in all subsequent novels.  Since the book series is told from the first person perspective of Sookie Stackhouse, what readers perceive of his character is influenced by what Sookie comprehends.  HBO's television series "True Blood" is based on this book series and the character of Eric Northman is portrayed somewhat differently.  A list of "True Blood" characters has a detailed description of Eric's character from the TV show.

Winnie-the-Pooh (book): Winnie-the-Pooh (1926) is the first volume of stories about Winnie-the-Pooh, by A. A. Milne.  It is followed by "The House at Pooh Corner".  The book focuses on the adventures of a teddy bear called Winnie-the-Pooh and his friends Piglet, a small toy pig; Eeyore, a toy donkey; Owl, a live owl; and Rabbit, a live rabbit.  The characters of Kanga, a toy kangaroo, and her son Roo are introduced later in the book, in the chapter entitled "In Which Kanga and Baby Roo Come to the Forest and Piglet has a Bath".  The bouncy toy-tiger character of Tigger is not introduced until the sequel, "The House at Pooh Corner".

Supporting paragraphs: Heffalump Winnie-the-Pooh (book)
Answer: The House at Pooh Corner