Synopses & Reviews
When Frank and Joe set out to explore caves and tunnels, they dig themselves into some dark and dangerous trouble in this Hardy Boys adventure.andlt;BRandgt;andlt;BRandgt;When a sinkhole opens up and swallows one of Bayportand#8217;s historic statues, Frank and Joe suspect somethingand#8212;or someoneand#8212;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.andlt;BRandgt; andlt;BRandgt;But in the thick of their search, the boys stumble upon an entire underground city thatand#8217;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?
About the Author
Franklin W. Dixon is the author of the ever-popular Hardy Boys books.