Hjärtats Nycklar is a Chamber Opera composed by Peter Bruun , with libretto by Ylva Eggehorn(Martin Lönnebo).
| Arrangement | Opera |
| Genres | Opera |
| Format | Vocal Score |
| Level | 5 |
| NumberOfPages | 98 |
| Media | Sheet Music |
| Publisher | Edition Wilhelm Hansen, Edition Wilhelm Hansen AS |
| Contributors | Bruun, Peter (Composer) Eggehorn, Ylva (Author) |
| Language | Swedish |
| ISBN | 9788759886410 |