3 etsivää ja pääkallosaari
| Book | The Secret of Skeleton Island |
| Publisher | Gummerus |
| Translated by | Leena Brummer |
| Printed by | K. J. Gummerus Osakeyhtiön kirjapaino |
| Copyright Holder | Random House, Inc. |
| Foreword by | Alfred Hitchcock |
| Cover Artist | Matti Louhi |
| Series | The Three Investigators |
| Format | Hardback |
| Language | Finnish |
| Location | Finland |
| Printed | 1973 |
| First Printing | 1966 |
| Copyright | 1966 |
| Pages / Font | 151 pages |
| ISBN | 951-20-0323-6 |
| YKL (Finnish) | N8453 |
Added by Gumby74