When an ornery book collector disappears, the Three Investigators break into his secret computer files in search of clues and gradually uncover his mysterious past.
- ISBN10 0394891538
- ISBN13 9780394891538
- Publish Date 12 September 1987
- Publish Status Active
- Publish Country US
- Imprint Random House Books for Young Readers
- Format Paperback (US Trade)
- Pages 182
- Language English