- Original title: Sirli, Siim and the Secrets
- Illustrator: Ilmar Trull
- Translator: Julija Potrč Šavli
- Language: Slovenian
- 2015, 196 pp
- ISBN: 9789616970181
- Age: 10+
- fiction, storybook
For more information or copyrights, please contact ulla.saar@elk.ee