https://gutenberg.org/ebooks/70236
The secret of the old mill by Franklin W. Dixon | Project Gutenberg
Free eBook digitized and proofread by volunteers.
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https://www.christianbook.com/hunting-for-hidden-gold-softcover-5/9780486852867/pd/85286X
Hunting for Hidden Gold, Softcover, #5: Franklin W. Dixon: 9780486852867 - Christianbook.com
Private investigator Fenton Hardy becomes injured while working on a case of stolen gold in Montana and sends a cryptic message urging his sons, Frank and Joe...
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https://www.abebooks.com/Secret-Caves-Franklin-Dixon-Illustrated-Walter/945096048/bd
The Secret of the Caves, by Franklin W. Dixon. Illustrated by Walter S. Rogers by Dixon, Franklin...
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https://www.christianbook.com/hardy-boys-mysteries-house-the-cliff/franklin-dixon/9780448089027/pd/089027
The Hardy Boys' Mysteries #2: The House on the Cliff: Franklin W. Dixon: 9780448089027 -...
When Mr. Hardy disappears while investigating a mystery surrounding a vacant house rumored to be either haunted or an abode for criminals, the Hardy Boys...
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https://en.wikipedia.org/wiki/Franklin_W._Dixon
Franklin W. Dixon - Wikipedia
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https://www.penguin.com.au/books/hardy-boys-starter-set-the-hardy-boys-starter-set-9780448464954
HARDY BOYS STARTER SET, The Hardy Boys Starter Set by Franklin W. Dixon - Penguin Books Australia
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