Plot summary

The Hardy Boys track down the saboteurs who kidnapped their father, and have to keep them from blowing up a bridge near Boontown, Kentucky. The bridge is being built by Tony Pritos fathers construction company. Mr Hardy is ill most of the story. The Villains are mostly ex-crooks who wants that area of the bridge for themselves.

• Publication date: 1966
• Ghostwriter: Andrew E. Svenson
• Summary: Saboteurs have kidnapped Fenton Hardy, and the boys must rescue their father while foiling a plot to blow up a bridge in Kentucky.