Age suitability of books is typically determined by the content and themes of the book, as well as the reading level and maturity of the reader. Publishers and educators often provide recommended age ranges for books to help guide readers and parents in selecting appropriate reading material. It is important for parents and caregivers to consider the individual interests and sensitivities of the child when determining age suitability of books. Additionally, discussions about the content of a book can help children process and understand challenging topics.