The Disappearing Friend Mystery (The Boxcar Children Mysteries Book 30)
| Country | USA | 
| Author | Gertrude Chandler Warner | 
| Binding | Kindle Edition | 
| EISBN | 9781453212677 | 
| Format | Kindle eBook | 
| Label | Albert Whitman & Company | 
| Manufacturer | Albert Whitman & Company | 
| NumberOfPages | 119 | 
| PublicationDate | 2011-03-01 | 
| Publisher | Albert Whitman & Company | 
| ReleaseDate | 2011-03-01 | 
| Studio | Albert Whitman & Company |