Tom Swift's father has been working diligently on a secret project, which he reveals at the beginning of the book as a submarine. With the submarine, named the Advance, he plans to enter a contest for a government prize of $50,000. While in New Jersey to launch the submarine, Tom reads in a newspaper that a ship named the Boldero sank off the coast of Uruguay during a storm, taking down with it the sum of $300,000 in gold bullion.

Tom Swift and His Submarine Boat 2017, Createspace Independent Publishing Platform

ISBN-13: 9781544131238

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Tom Swift and His Submarine Boat 2017, Createspace Independent Publishing Platform

ISBN-13: 9781547249336

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Tom Swift and His Submarine Boat 2015, Createspace Independent Publishing Platform

ISBN-13: 9781522727750

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Tom Swift and His Submarine Boat 2014, Createspace

ISBN-13: 9781500213343

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Tom Swift and His Submarine Boat 2010, Salzwasser-Verlag Gmbh

ISBN-13: 9783861953784

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Tom Swift and His Submarine Boat 2010, Kessinger Publishing, Whitefish MT

ISBN-13: 9781161478587

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Tom Swift and His Submarine Boat 2010, Kessinger Publishing, Whitefish MT

ISBN-13: 9781162709949

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Tom Swift and His Submarine Boat 2009, Echo Library

ISBN-13: 9781406892895

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Tom Swift and His Submarine Boat 2008, BiblioLife, Charleston SC

ISBN-13: 9781434679581

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Tom Swift and His Submarine Boat 2008, BiblioLife, Charleston SC

ISBN-13: 9781434679598

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Tom Swift and His Submarine Boat 2008, BiblioLife, Charleston SC

ISBN-13: 9780554295886

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Tom Swift and His Submarine Boat 2008, BiblioLife, Charleston SC

ISBN-13: 9780554388915

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Tom Swift and His Submarine Boat 2005, IndyPublish.com

ISBN-13: 9781414242545

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Tom Swift and His Submarine Boat 2004, Kessinger Publishing, Whitefish MT

ISBN-13: 9781419184628

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Tom Swift and His Submarine Boat 2002, IndyPublish.com

ISBN-13: 9781404335677

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