Fourteen years ago, Joan Gregory was lost in a shipwreck in the South Pacific Ocean, and fourteen years her mother spent searching for her the world over. When Joan was found on the Magic Island, a strange place which the scientists living there have named Euclidia, it seemed that Mrs. Gregory's troubles were at an end. Now, however, we find that this is not the case, as the island of Euclidia contains so many powerful and unusual scientific devices and discoveries that it m…