Here's why:
* Realistic fiction: The story focuses on a boy named Paul's experiences surviving a harsh winter in the wilderness of Minnesota. The story is grounded in the realities of the natural world, with realistic details about weather, animals, and survival techniques.
* Survival fiction: The core of the narrative revolves around Paul's struggle to stay alive in a challenging environment. He faces real dangers, makes difficult decisions, and utilizes his resourcefulness to overcome the elements and ensure his survival.
Although the story is fictional, it draws heavily on Paulsen's own experiences living in the wilderness, giving it a strong sense of authenticity and making it resonate with readers.