| 作者 (Author) | Osborne, Mary Pope |
| Summary: Jack and Annie travel in their magic tree house to the land of the mystical selkies to seek a magical sword for Merlin. Book #31 | |
| 等级 (MML) | MM Level-3.5 |
| 年级 (IL) | Lower Grades (LG K-3) |
| 字数 (Words) | 11122 |
| 类型 (Fiction) | Fiction |
| 系列 (Series) | Magic Tree House; Magic Tree House: Merlin Missions; Stepping Stone; |
| Topic: Family Life-Brothers; Family Life-Sisters; Fantasy/Imagination-Magic; Recommended Reading-Reading Rockets; Science Fiction-Time Travel; | |
