Question: Were both Escape to Witch Mountain and The Muppets films adapted from science fiction novels written by Alexander H. Key?

Context paragraphs:
List of technology in the Dune universe: The technology in the "Dune" universe is a key aspect of the fictional setting of the "Dune" series of science fiction novels written by Frank Herbert, and derivative works.  Herbert's concepts and inventions have been analyzed and deconstructed in at least one book, "The Science of Dune" (2008).  Herbert's originating 1965 novel "Dune" is popularly considered one of the greatest science fiction novels of all time, and is frequently cited as the best-selling science fiction novel in history.  "Dune" and its five sequels by Herbert explore the complex and multilayered interactions of politics, religion, ecology and technology, among other themes.

Beyond Witch Mountain: Beyond Witch Mountain is a 1982 American Television science fiction-fantasy film and a sequel to "Escape to Witch Mountain" (1975) and "Return from Witch Mountain" (1978).  Although Eddie Albert returned to play Jason O'Day from the original 1975 movie, the parts of Tony and Tia were recast with actors comparable in age to Ike Eisenmann and Kim Richards when they first played the parts.  Tracey Gold from "Growing Pains" played Tia, and Andy Freeman played Tony.  The parts of Aristotle Bolt, Lucas Deranian and Uncle Bené were also recast.

The Muppets (film): The Muppets is a 2011 American musical comedy film and the seventh theatrical film featuring the Muppets.  The film is directed by James Bobin, written by Jason Segel and Nicholas Stoller, produced by David Hoberman and Todd Lieberman, and stars Segel, Amy Adams, Chris Cooper and Rashida Jones, as well as Muppet performers Steve Whitmire, Eric Jacobson, Dave Goelz, Bill Barretta, David Rudman, Matt Vogel, and Peter Linz.  Bret McKenzie served as music supervisor, writing four of the film's five original songs, and Christophe Beck composed the film's score.  In "The Muppets", devoted fan Walter, his brother Gary, and Gary's girlfriend Mary help Kermit the Frog reunite the disbanded Muppets, as they must raise $10 million to save the Muppet Theater from Tex Richman, a businessman who plans to demolish the studio to drill for oil.

Return from Witch Mountain: Return from Witch Mountain is a 1978 American science fiction–adventure film and a sequel to "Escape to Witch Mountain" (1975), produced by Walt Disney Productions.  It was written by Malcolm Marmorstein and is based on the novel by Alexander Key.  Ike Eisenmann, Kim Richards, and Denver Pyle reprise their roles as Tony, Tia, and Uncle Bené—humanoid extraterrestrials with special powers including telepathy and telekinesis.  The two main villains are played by Bette Davis as Letha Wedge, a greedy woman using the last of her money to finance the scientific experiments of Dr. Victor Gannon, played by Christopher Lee.

Race to Witch Mountain: Race to Witch Mountain is a 2009 American science fiction adventure thriller film and a remake of the 1975 Disney film "Escape to Witch Mountain", which is based on the 1968 novel of the same name by Alexander Key.  The film is directed by Andy Fickman and stars Dwayne Johnson, AnnaSophia Robb, Alexander Ludwig, Ciarán Hinds, and Carla Gugino.

List of science fiction novels: This is a list of science fiction novels, novel series, and collections of linked short stories.  It includes modern novels, as well as novels written before the term "science fiction" was in common use.  This list includes novels not marketed as SF but still considered to be substantially science fiction in content by some critics, such as "Nineteen Eighty Four".  As such, it is an inclusive list, not an exclusive list based on other factors such as level of notability or literary quality.  Books are listed in alphabetical order by title, ignoring the leading articles "A", "An", and "The".  Novel series are alphabetical by author-designated name or, if there is none, the title of the first novel in the series or some other reasonable designation.

Escape to Witch Mountain (1975 film): Escape to Witch Mountain is a 1975 American fantasy-children's film, adapted from the science fiction novel written by Alexander H. Key in 1968.  The film was produced by Walt Disney Productions, released in March 1975 by Buena Vista Distribution Company and directed by John Hough.

Year's Best Science Fiction Novels: 1952: Year’s Best Science Fiction Novels: 1952 is a 1952 anthology of science fiction novels and novellas edited by E. F. Bleiler and T. E. Dikty.  An abridged edition was published in the UK by Grayson in 1954 under the title "The Year’s Best Science Fiction Novels".  The stories had originally appeared in 1951 in the magazines "Astounding", "Super Science Stories" and "Two Complete Science-Adventure Books".

Year's Best Science Fiction Novels: 1954: Year’s Best Science Fiction Novels: 1954 is a 1954 anthology of science fiction novellas edited by E. F. Bleiler and T. E. Dikty.  An abridged edition was published in the UK by Grayson in 1955 under the title "The Year’s Best Science Fiction Novels: Second Series".  The stories had originally appeared in 1953 and 1954 in the magazines "Amazing Stories", "Thrilling Wonder Stories", "Science Stories", "Galaxy Science Fiction" and "Space Science Fiction".

Escape to Witch Mountain: Escape to Witch Mountain is a science fiction novel written by Alexander H. Key in 1968.  It was adapted into a film of the same name by Walt Disney Productions in 1975, directed by John Hough.  A remake directed by Peter Rader was released in 1995. " Race to Witch Mountain", a new telling directed by Andy Fickman, opened theatrically March 13, 2009.

Supporting paragraphs: Escape to Witch Mountain (1975 film) The Muppets (film)
Answer: no