| GMD | Text |
| Classification | 948.022 OSB |
| Publisher | New York, Random House, c1998 |
| Subject | Time travel -- Juvenile fiction.Magic -- Juvenile fiction.Tree houses -- Juvenile fiction.Adventure and adventurers -- Juvenile fiction.Vikings -- Juvenile fiction.Monasteries -- Juvenile fiction.Ireland -- Juvenile fiction. |
| Topic | Grade 1 Reading (190L-530L)Grade 2-3 Reading (420L-820L) |
| Series | Magic Tree House#15 |
| Description | 71 p. : ill. ; 20 cm. |
| ISBN | 9780679890614 |
| Additional ISBN | 9780590706438 |
| Suitable | From 6 To 9 |