The Disappearing Floor by Franklin W. Dixon
Teen sleuths Frank and Joe investigate a baffling case when a room in a scientist’s laboratory seems to vanish beneath people’s feet, leading them through a trail of clues, secret passages, and mechanical trickery. As they piece together the inventor’s missing plans and confront suspicious characters, the brothers face dangerous traps and narrow escapes before exposing a criminal plot and helping recover stolen property.
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- Published
- Unknown
- Nationality
- American
- Length
- Unknown
- Pages
- Unknown
- Original Language
- English
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