What is the fine-grained topic of the following text: From Louisa May Alcott's Little Women to J. K. Rowling's Harry Potter and the Philosopher's Stone to Melvin Burgess's Junk, each has been selected because they still find a favoured place on the bookshelves of today's children and because they are widely studied on university courses. Only return the topic.
Children's literature and its continued popularity and academic study