Books like Tunnel of Secrets by Franklin W. Dixon
When Frank and Joe Hardy set out to explore caves and tunnels near Bayport, they find a sinkhole swallowing a historic statue and suspect foul play. As members of their respective groups—Joe with an urban exploration club and Frank as a school‑paper photographer—they investigate. Their search leads them into an abandoned underground city, now home to a cult of criminals aiming to take over Bayport. After surviving a boulder collapse and a runaway train, the brothers confront the danger, determined to stop the crooks and protect their hometown.
First publish date: 2015
Genre: Children's Fiction/Children's Adventure
Authors: Franklin W. Dixon
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Books similar to Tunnel of Secrets (27 similar books)
Frank and Joe Hardy investigate the mystery of a sunken golden Pharaoh head, encountering an ancient pirate ghost, insurance intrigue, and a deadly explosion on Whalebone Island.
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When Daisy Rodriguez vanishes from Bayport’s amusement park, the Hardy Boys must unravel a baffling disappearance that may link to a past mystery.
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When a massive sea turtle disappears from Bayport Aquarium, Hardy brothers Frank and Joe uncover underground tunnels that support a smuggling ring, turning a missing‑animal case into a thrilling crime investigation.
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Frank and Joe Hardy race to stop a gang of viral pranksters threatening a Sweet Sixteen party with vandalism.
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In a new Hardy Boys adventure, Frank and Joe investigate a series of bank heists and prank schemes in Bayport that unveil a dangerous crime gang, putting the town—and themselves—at risk.
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Frank and Joe Hardy investigate a mysterious estate, uncovering a dead owner's secret key, a deserted mansion without locks, and a criminal ring targeting electronics warehouses, linking the two cases into a suspenseful mystery.
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When a Japanese tycoon vanishes from the United States, the Hardy Boys track a missing samurai sword that surfaces at a New York auction, leading them into a world of danger and mystery.
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The Hardy Boys race across the deep South to clear a disgraced Confederate general’s name and uncover hidden Civil War gold, evading criminals, booby‑traps, and dangerous bullets in this tense mystery adventure.
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Frank and Joe Hardy plunge into a high‑stakes adventure in the Bahamas, chasing a sunken ship’s gold while battling rival treasure hunters and dangerous sea creatures.
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Frank and Joe Hardy must survive a rugged Black Bear Mountain campsite to find their missing teacher and escape a dangerous axe-wielding stranger.
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Teen detectives Joe and Frank Hardy investigate a dangerous plot to sabotage a ski resort, turning a mountain getaway into a thrilling mystery for young readers.
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Joe and Frank investigate a missing patron at an amusement park now owned by their friend Daisy, sparking danger for Daisy's family's business.
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A young detective duo investigates a sophisticated ring of luggage thieves threatening an airline, reminiscent of the popular Hardy Boys series in its premise and tone, featuring classic Hardy Boys characters such as Frank and Joe, and the series' hallmark of suspense and adventure in a high-stakes world of mystery and crime-solving gone wrong for children and young adults alike.
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During a Revolutionary War reenactment, Nancy and Joe discover a real casualty and are drawn into an investigation that tests their detective skills.
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Frank and Joe Hardy investigate a mysterious death and possible supernatural hints while uncovering a crime at their favorite author’s haunted house.
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Frank and Joe Hardy investigate the disappearance of their new friend Harper after a comic‑book convention, uncovering hidden secrets and dangerous messages.
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Frank and Joe Hardy investigate the kidnapping of Soviet twins tied to a peace negotiator during a summer at Oxford, uncovering international intrigue.
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Frank and Joe Hardy tackle a series of daring thefts and cryptic riddles as they hunt the elusive Phantom, racing to protect Bayport's priceless treasures before another robbery strikes.
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Frank and Joe Hardy investigate a legendary sasquatch—the Bayport Beast—that has reawakened when summer sightings spike, drawing UFO enthusiasts, media, and the scary creatures themselves.
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When the annual Welch Rodeo and Wild West Show brings the West to Bayport, Frank and Joe Hunt a ring of cattle‑rustlers who steal a prize horse, and race across the countryside to recover Hondo before the herd roams free.
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Frank and Joe Hardy are drafted onto their school’s basketball team, only to confront a masked kidnapping ring targeting new players amid a deadly initiation scheme.
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When a stolen Sherlock Holmes manuscript surfaces in the Hardy Boys’ gear, brothers Frank and Joe must clear their names by ridding town of a Moriarty‑style villain using a squad of skateboarding tweens as their clandestine informants.
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Frank and Joe Hardy investigate a daring art heist in Paris, chasing the elusive street‑artist Le Stylo and navigating the city’s museums, catacombs, and underground intrigue.
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Frank and Joe Hardy investigate a kidnapped movie star while filming a movie at a ski resort, and soon discover that the suspenseful mystery has turned into a dangerous chase.
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A Hardy Boys adventure in a zombie movie, where the cast must track down a saboteur that threatens the film's production.
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Frank and Joe Hardy investigate a vanished comic book hidden beneath Bayport Castle, using their detective skills and newfound LARPing tactics to crack the mystery before the Halloween ball.
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Some Other Similar Books
Secret of the Hidden Cave by Carolyn KeeneThe Mystery of the Silent Spy by Marshall Jevons
The Secret of Shadow Ranch by Nancy Drew
The Clue of the Broken Locket by Enid Blyton
The Hidden Fortress by Eric Van Lustbader
The Vanishing Vault by Kate Milford
The Secret of the Old Clock by Nancy Drew
Mystery of the Crimson Cove by Carolyn Keene
The Ghostly Trail by Franklin W. Dixon
The Case of the Mysterious Map by Enid Blyton
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