language: English
title: The Hardy Boys 3 In 1: The Submarine Caper / The Four-Headed Dragon / The Infinity Clue
titlecomplete: The Hardy Boys 3 In 1: The Submarine Caper / The Four-Headed Dragon / The Infinity Clue (The Hardy Boys #68-70)
ratings_count: 12
series: The Hardy Boys
publisher: HarperCollins Publishers