| 作者 (Author) | Roy, Ron |
| Summary: At Green Lawn Elementary, the entire school becomes involved in a mystery when Mr. Bones, the skeleton in the nurse's office, disappears. | |
| 等级 (MML) | MM Level-3.7 |
| 年级 (IL) | Lower Grades (LG K-3) |
| 字数 (Words) | 8690 |
| 类型 (Fiction) | Fiction |
| 系列 (Series) | Stepping Stone; A to Z Mysteries; |
| Topic: Community Life-School; Holidays-April Fools' Day; Mysteries-Lost Items; Recommended Reading-Reading Rockets; | |
