While staying with their aunt in an English seaside town, the Mallory children find a secret passage into the mysterious old house next door, where their efforts to help a strange girl lead to trouble and adventure.
- ISBN10 0395586704
- ISBN13 9780395586709
- Publish Date 31 December 1992
- Publish Status Out of Print
- Out of Print 21 June 2021
- Publish Country US
- Publisher Houghton Mifflin
- Imprint Houghton Mifflin (Trade)
- Format Hardcover
- Pages 187
- Language English