- Pop Culture Urban Legends: Even the Google Books page for The Jewel Princesses and the Missing Crown perpetuates the long-held misconception that the final book adds four new Jewel Princesses. It doesn't. The other four gems on the cover are just meant to represent the Great Jewelled Crown.
- Self-Adaptation: One of the authors directed The Film of the Book and both did the script for it.
Trivia / The Jewel Kingdom