I read this book somewhere between 1963 and 1966 when it was new. It was sold through an elementary school book fair. A girl wanders off and finds herself in a magical kingdom. There she is a princess. There’s a fight in a castle. Goblins enter the castle by turning themselves into doorknobs. At some point in the magical kingdom, she wanders up a hill and finds a dragon cave. The dragon turns out to be peaceful, although misunderstood, and she has tea with him and they become friends. He flies her around the kingdom and alights on the roof of the castle with her.
The book was paperback with a light blue cover.
