The Enchanted Castle was published five years after Five Children and It. It seemed to me that Five Children was written for younger children, and The Enchanted Castle was the same basic story filled out to nearly 300 pages, written for older children. Five Children was funnier, but The Enchanted Castle has more depth to it, and is still a good read. I recommend it to pre-teens only if they're already familiar with British literature, as some of the concepts and terms might be unfamiliar to them. Adults will like it too. It raises a couple good questions: if you could turn invisible, what would you do? If you could have any wish, what would it be?