|"Is this all real? Or has this been happening inside my head?"
The subject of this article is a real-life person, group, company, product, or creative work that has been mentioned "in-universe" in a canon source. The Harry Potter Wiki is written from the perspective that all information presented in canon is true (e.g., Hogwarts really exists), and, as such, details contained in this article may differ from real world facts.
Scholastic Press is an American Muggle publishing house, focusing on educational and children's literature. One of their divisions, Arthur A. Levine Books, published the American versions of Fantastic Beasts and Where to Find Them and Quidditch Through the Ages for Muggles in association with those books' original wizarding publishers.