E Nesbit

The Enchanted Castle E Nesbit

Three children discover an old country estate during their school holidays. When they're exploring it they come upon a mysterious young girl claiming to be a fairy princess. She shows them the castle's treasure, including a ring that will turn you invisible. But no one is more surprised than she when she slips it on her finger ... and disappears! The ring is indeed magical, and the children waste no time finding out what else it can do.