One day Billie and Jack find a note hidden under a rock at school. It seems to be written in code! It's time the two friends put their code-breaking skills to the test.
| ISBN: | 9781743581315 |
| Publication date: | 1st November 2013 |
| Author: | Rippin, Sally |
| Publisher: | Hardie Grant Children's Publishing |
| Format: | Ebook |