Here's why:
* Mythical Creatures: The book features trolls, a classic mythical creature often associated with fantasy.
* Magical Elements: There are other magical elements, like the ability to shapeshift and other spells.
* Fantasy Setting: The story takes place in a fictional world with its own unique geography, cultures, and rules.
While the book touches on themes like survival, adventure, and family, its core elements firmly place it within the fantasy genre.