Tunnel of Secrets
volume 10, Hardy Boys Adventures
No. of pages 144
Published: 2015
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When a sinkhole opens up and swallows one of Bayport's historic statues, Frank and Joe suspect something-or someone-shady at play. They jump at the chance to investigate; Joe as a member of an urban exploration club, and Frank as photographer for the school paper.
But in the thick of their search, the boys stumble upon an entire underground city that's been abandoned for years. Now the city is home to a cultish band of criminals who plan to take over Bayport. Frank and Joe are determined to shut down the crooks, but after being barreled down by a boulder and nearly squashed by a runaway train, they have to wonder: are they in over their heads?
This book has been graded for interest at 8-12 years.
There are 144 pages in this book. This book was published 2015 by Simon & Schuster .
Franklin W. Dixon is the author of the ever-popular Hardy Boys books.
This book is in the following series:
