Gnomes (first published in Dutch in 1976 as Leven en werken van de kabouter; English, 1977), one in a series of books, was written by Wil Huygen and illustrated by Rien Poortvliet.
 The book explains the life and habitat of gnomes in an in-universe fashion, much as a biology book would do, complete with illustrations and textbook notes.
Wisdom of the Gnomes (Spanish: "La llamada de los gnomos" , literally "Call of the gnomes") is an animated series produced by Spanish company BRB Internacional about Gnomes.
 It was a spin-off of the series "The World of David the Gnome".
 It was based on the books "The Secret Book of Gnomes" by Wil Huygen.
Wil (Willibrord Joseph) Huygen (23 June 1922  – 14 January 2009) was a Dutch book author.
 He is best known for the picture books on gnomes, illustrated by Rien Poortvliet.
Gnomes is an American 1980 animated film, based on the book of the same name by the Dutch Wil Huygen and Rien Poortvliet.
 The movie was nominated for an Emmy in 1981 for "Outstanding Animated Program".
The World of David the Gnome, originally titled David, el Gnomo (also known as David, the Gnome), is a Spanish animated television series based on the children's book "The Secret Book of Gnomes", by the Dutch author Wil Huygen and illustrator Rien Poortvliet.
 The program was originally created in Spain by BRB Internacional (who were also responsible for the "Dogtanian and the Three Muskehounds" franchise and other cartoons such as "Bobobobs" and "Around the World with Willy Fog") titled "David el Gnomo", and retains a sense of the lush illustrations of the original books.
 Twenty-six episodes were produced.
 There was also a spin-off series entitled "Wisdom of the Gnomes".
The Secret Book of Gnomes is a series of books about Gnomes designed for children.
 They contain fictional stories and guides about how Gnomes live in harmony with their environment, such as what a Gnome has in his first aid kit and how a Gnome's house is built.
 The books were written by the Dutch author Wil Huygen and illustrator Rien Poortvliet, though they have claimed that parts were written by a Gnome called David.
 Those authors also created another series about Gnomes entitled The Gnomes.
"Gnomes" is the seventeenth episode in the second season of the American animated television series "South Park".
 The 30th episode of the series overall, it originally aired on Comedy Central in the United States on December 16, 1998.
 The episode was written by series co-creators Trey Parker and Matt Stone, along with Pam Brady, and directed by Parker.
 This episode marks the first appearance of Tweek Tweak and his parents.
Sweet Pickles is a series of 40 children's books by Ruth Lerner Perle, Jacquelyn Reinach, and Richard Hefter and published by Holt, Rinehart & Winston, having sold over 50 million copies.
 The books are set in the fictional town of Sweet Pickles and are about anthropomorphic animals with different personalities and behavior.
 There are 26 animals—one for each letter of the alphabet.
 The books were published in 1977 and went out of print in the mid-1990s.
 The authors also created Stickybear and the Strawberry Library.
Fantaghirò is a 1999 Spanish animated television series based on the Italian fantasy film series "Fantaghirò".
 It was created by BRB Internacional with animation by Colorland Animation Production, written by Francesca Melandri, Giovanni Romoli and Lamberto Bava, produced by Mediaset, Telecinco and Grupo Planeta, with music by Mark Bradley and Terry Wilson.
 A 75-minute animated film "Fantaghirò: Quest for the Kuorum" edited together using footage from the series was released in 2000.
South Park: The Stick of Truth is a 2014 role-playing video game developed by Obsidian Entertainment in collaboration with South Park Digital Studios and published by Ubisoft.
 Based on the American adult animated television series "South Park", the game follows the New Kid, who has moved to the eponymous town and becomes involved in an epic role-play fantasy war involving humans, wizards, and elves, who are fighting for control of the all-powerful Stick of Truth.
 Their game quickly escalates out of control and brings them into conflict with aliens, Nazi zombies, and gnomes, threatening the entire town with destruction.

Question: The Secret Book of Gnomes is a series of books about Gnomes designed for children, Those authors also created another series about Gnomes entitled what, a Spanish animated television series based on the children's book "The Secret Book of Gnomes", by the Dutch author Wil Huygen?
Answer: The World of David the Gnome