| GMD | Text |
| Classification | 813.6 OSB |
| Publisher | New York, Random House, c2009 |
| Subject | Tree houses -- Fiction.Brothers and sisters -- Fiction.Magic -- Fiction.Time travel -- Fiction.Time travel -- Juvenile fiction.Tree houses -- Juvenile fiction.Magic -- Juvenile fiction.Brothers and sisters -- Juvenile fiction.Adventure and adventurers -- Juvenile fiction.Mozart, Wolfgang Amadeus, -- 1756-1791 -- Juvenile fiction.Vienna (Austria) -- History -- 18th century -- Juvenile fiction.Austria -- History -- 1740-1789 -- Juvenile fiction. |
| Topic | Grade 1 Reading (190L-530L)Grade 2-3 Reading (420L-820L) |
| Series | Magic Tree House#41 |
| Description | 106 p. : ill. ; 20 cm. |
| ISBN | 9780375856471 |
| Additional ISBN | 9780545299497 |
| Suitable | From 6 To 9 |