Here's why:
* Personal Narrative: It is a firsthand account of Anne Frank's experiences during her time hiding from the Nazis in Amsterdam.
* Emotional and Reflective: The diary entries are filled with Anne's thoughts, feelings, and reflections on her life, her family, and the world around her.
* Historical Context: The diary provides a unique perspective on the Holocaust and the impact of war on individuals.
Although it's written in diary form, its content and purpose go beyond a simple personal journal, making it a significant piece of historical and literary writing.