 |  | | ISBN: | 9510144460 |
| Title: | Vaarallinen juhannus |
| Original Title: | Farlig midsommar |
| Original English Title: | Moominsummer Madness |
| First Published: | 1954 |
| Publisher: | WSOY Helsinki |
| Country of Publication: | Finland |
| Language: | Finnish |
| Binding: | Paperback |
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| Author, Illustrator: | Tove Jansson |
| Translation: | Laila Järvinen |
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