The Mystery of the Spiral Bridge
Franklin W. Dixon
Hardcover
(Grosset & Dunlap, Aug. 16, 1966)
From the fascinating adventures of the Hardy Boys Mystery stories comes title #45, written for boys of all ages who like plenty of action: "Frank and Joe Hardy are determined to bring to justice the vicious criminals who kidnapped their detective father while he was investigating sabotage of a road-building project in the Kentucky wilderness. After Mr. Hardy's amazing escape, the boys pick up a clue - the word 'Felix', mumbled by their sick father in his delirium. When they discover that the dossier of a notorious ex-convict has been stolen from Mr. Hardy's files, the two young sleuths are doubly spurred to action. The trail leads them to New York City but ends abruptly in a cemetery!..."