After one of Ernest the wizard-lizard's spells goes awry, draining color from Princess Prism and her domain, the unicorn princesses call on the human girl Cressida to help Prism locate the Valley of Light's missing rainbow so she regain her magic and repaint the land and creatures.
- ISBN10 168119337X
- ISBN13 9781681193373
- Publish Date 26 December 2017
- Publish Status Out of Print
- Out of Print 5 October 2023
- Publish Country US
- Publisher Bloomsbury Publishing Plc
- Imprint Bloomsbury Childrens Books
- Format Hardcover
- Pages 128
- Language English