| Other Title | Mystery Letter |
| GMD | Periodical |
| Classification | F ADV |
| Publisher | London, Children's Magazine Co |
| Subject | Children's periodicals.Children Stories |
| Topic | Grade 2-3 Reading (420L-820L) |
| Series | Adventure Box. #N. 139 |
| Description | v : col. ill. ; 20 cm. |
| ISBN | 13669001 |
| URL | www.bayard-magazines.co.uk |
| Suitable | From 6 To 9 |