description: Contains Deadly Chase (formerly The Submarine Caper), Infinity Clue, Track of the Zombie and Swamp Monster
title: The Submarine Caper/The Infinity Clue/Track of the Zombie/The Billion Dollar Ransom
titlecomplete: The Submarine Caper/The Infinity Clue/Track of the Zombie/The Billion Dollar Ransom (The Hardy Boys 68, 70-71 & 73)
ratings_count: 7
publisher: Wanderer