Title rated 4.35 out of 5 stars, based on 45 ratings(45 ratings)
Book, 1966
Current format, Book, 1966, , Available .
Book, 1966
Current format, Book, 1966, , Available . Offered in 0 more formats
Frank and Joe Hardy are determined to bring to justice the vicious criminals who kidnapped their detective father while he was investigation sabotage of a road-building project in the Kentucky wilderness. After Mr. Hardy's escape, the two young sleuths are spurred into action when he mumbles the word "Felix" and they discover a dossier of a notorious ex-convict was stolen from his files. The trail leads them to New York City but ends abruptly in a cemetery! With the new clue of a spiral symbol the boys head to Kentucky as part of a highway construction crew to track down the kidnappers and saboteurs.
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