児童文学とは、何歳から何歳までの読者をターゲットとしていますか？
The distinctions among children's literature, young adult literature, and adult literature have historically been flexible and loosely defined. This line is often policed by adults who feel strongly about the border. At the lower end of the age spectrum, fiction targeted to readers age 9 to 12 is referred to as middle-grade fiction. Some novels originally marketed to adults are of interest and value to adolescents, and vice versa, as in the case of books such as the "Harry Potter" series of novels.
9 to 12