Question: In what book is a heffalump a fictional character

 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). A Heffalump is a type of fictional elephant in the Winnie the Pooh stories by A. A. Milne.  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". <SEP>  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". Winnie-the-Pooh (1926) is the first volume of stories about Winnie-the-Pooh, by A. A. Milne.  The bouncy toy-tiger character of Tigger is not introduced until the sequel, "The House at Pooh Corner". <SEP> 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. <SEP> 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.