What age group does J.K. Rowling write for?

J. K. Rowling is best known for her Harry Potter series, which is primarily written for children and young adults. The books are set at Hogwarts School of Witchcraft and Wizardry, and follow the adventures of the young wizard Harry Potter and his friends as they grow and learn about themselves and the magical world around them. The series is suitable for readers aged 9-12 and up. However, Rowling's works encompass a wider range of age groups, including adults. Her other notable works, such as the Cormoran Strike series, are crime fiction novels intended for adult audiences.