Mystery
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Frank and Joe Hardy investigate when danger threatens Bayport's new self-defense school and find themselves up against a ruthless real-estate developer out to buy the building in which the school is located.
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Editions
2 editions- Paperback · English · 1990In Self-Defense (Hardy Boys Case File 45)Simon Pulse · 160 pages · 9780671700423
- Other · English · 1999Tandem Library · 9780785750772
Detective and mystery storiesChildren's fictionMystery and detective stories