El regne subterrani
| Book | Underground Kingdom |
| Illustrator | Anthony Kramer |
| Publisher | Editorial Timun Mas, S. A. |
| Series | Tria la Teva Aventura |
| Translated by | Carme Tello |
| Format | Paperback |
| Language | Catalan |
| Location | Barcelona, Spain |
| Copyright | 1983 |
| This Edition Published | 1984-09 |
| Pages / Font | 108 pages |
| ISBN 10 | 8471766175 |
| DL (Spanish) | B. 18.046-1984 |
| Series Number | 8 |
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