Here's why:
* Fantasy: The core concept revolves around magical Disney characters and objects, such as the "Disney Dreamers" who become "Kingdom Keepers" to protect the Disney theme parks from malevolent forces.
* Science Fiction: The books explore themes of advanced technology, virtual reality, and time travel. The "Dreamers" use a special device called the "Dreamfinder" to enter the Disney worlds and interact with the characters.
* Mystery: The stories involve solving puzzles, uncovering secrets, and battling villains who are attempting to corrupt the Disney magic.
Therefore, while the series is primarily considered fantasy, it does incorporate elements of science fiction, making it a unique blend of genres.