The Hardy Boys Books in Order

Frank and Joe Hardy help their father investigate drug smugglers by watching the coast from a clifftop house. Cries for help lure them inside, where a trap turns their lookout assignment into a dangerous encounter.

Two investigations lead Frank and Joe Hardy to Turner Mill, where they suspect important clues are hidden. A trick gets them inside, but becoming trapped forces the brothers to find a way out while pursuing the truth.

A robbery at Tower Mansion leaves a friend’s father under suspicion. Frank and Joe Hardy follow clues connected with a red-haired thief, hoping to recover the stolen valuables and prove the accused caretaker’s innocence.

Frank and Joe Hardy pursue a gang responsible for a payroll robbery in the Rocky Mountains. Wolves, a blizzard, and a mine collapse complicate their search for the criminals and the gold connected with the case.

When their friends disappear, Frank and Joe Hardy take up a case with personal stakes. The brothers follow clues toward a group of kidnappers, determined to locate the missing boys before their captors can carry out their plans.

Frank and Joe Hardy help Jack Dodd and his father search for a family treasure. Their investigation becomes increasingly dangerous as road traps, an aerial ambush, and suspicious figures complicate the clues they are trying to follow.

Frank and Joe Hardy reach Cabin Island by iceboat to investigate a missing boy and stolen antique medals. An aggressive stranger, sabotage, and a mysterious prowler threaten their efforts to solve both cases in the winter landscape.

A missing professor leads Frank and Joe Hardy from a college examination paper to the Honeycomb Caves. Their search along the coast brings dangerous encounters and strange discoveries as they work to explain the man’s disappearance.

Frank and Joe Hardy go undercover at Stanwide Mining Equipment to investigate missing aircraft shipments containing platinum. Questions about a chief pilot’s death complicate the theft case, and the clues draw them toward a Caribbean island.

Frank and Joe Hardy try to secure a scientist’s secret invention before thieves can steal it. When Joe is kidnapped, the case becomes a dangerous personal search, forcing Frank and their friends to pursue a larger mystery.

A banker receiving threatening messages asks Frank and Joe Hardy for help. Their investigation draws them into the activities of a notorious group of thieves, where identifying the source of the threats becomes increasingly dangerous.

Frank and Joe Hardy investigate a scheme to steal a secret instrument essential to the American space program. Protecting the device gives the brothers a case whose consequences reach far beyond the mysterious clues before them.

A stolen speedboat, a submarine periscope, and a threatening message send Frank and Joe Hardy toward Mexico. Strange marks on doors and reports of missing people complicate their father’s investigation into an oil-smuggling operation.

Attacks on two brothers living on neighboring properties draw Frank and Joe Hardy into a dispute with more than family rivalry behind it. Rumors of hidden treasure lead them through secret passages and increasingly suspicious encounters.

Frank and Joe Hardy investigate mysterious race-car crashes linked to warning signposts that vanish afterward. As they assist their father, the attempted theft of an experimental engine adds another danger to the strange case.

A blind peddler’s warning and a glass eye send Frank and Joe Hardy toward a guarded estate. A wealthy businessman hiding in fear offers a new thread in a case that leads into a dangerous house.

A valuable golden pharaoh’s head is said to have sunk aboard a freighter near Whalebone Island. Frank and Joe Hardy help their father investigate whether its owner’s insurance claim conceals a scheme to defraud the shipping company.

Museum thefts of pirate treasures lead Frank and Joe Hardy to watch a suspicious freighter in Bayport Harbor. Their investigation takes them toward the Caribbean and a criminal who claims to rule an empire of pirates.

Tracking a jewel thief brings Frank and Joe Hardy to a guarded mansion near Bayport. A mysterious death, a seemingly ghostly rider, and a disappearing floor complicate their effort to connect the estate with the criminals.

Frank and Joe Hardy guard a new hydrofoil after its owner receives threats from opponents of the service. When the Flying Express disappears, their assignment becomes a dangerous pursuit of criminals across land, water, and air.

A broken saber may prove their fencing master’s right to an inheritance, sending Frank and Joe Hardy to California. A bank robbery and stolen records entangle their search with criminals operating in the grape-growing region.

Two unexplained plane crashes draw Frank and Joe Hardy into an investigation near an East Coast airport. A radioactive engine in an airplane junkyard adds a disturbing clue, and following it puts the brothers in unexpected danger.

Chet's enrollment at an unusually appealing summer school makes Frank and Joe suspicious. Their investigation overlaps with the theft of a sacred mask from a Seneca reservation, raising questions about the college and its professors.

The theft of stuffed animals from an auction sends Frank and Joe after a getaway car. Their case begins to overlap with their father's investigation of industrial spies, drawing the brothers into the wilderness of northern Canada.

A motorist's simple request leads Frank and Joe to a mansion with unusual doors and a troubling question about its owner. Meanwhile, their father's search for a kidnapped doctor points them toward a concealed panel and another dangerous mystery.

An unusual stranger asks Frank and Joe to arrange a sea voyage, while a misplaced parcel creates trouble at home. A freighter that seems to vanish links their growing questions to a smuggling operation and danger offshore.

Bayport faces a water shortage as its new reservoir mysteriously loses water each night. Frank and Joe join a team of engineers to investigate Skull Mountain, where solving the puzzle is essential to protecting the city's supply.

Frank and Joe interrupt their investigation of jewelry robberies to help a cousin on a New Mexico cattle ranch. Trouble on the ranch and an unusual arrow clue draw them into a case reaching beyond Bayport.

Frank and Joe travel to the Deep South to clear a Confederate general accused of stealing bank gold. A museum clue points toward the lost treasure, but criminals intent on claiming it turn their historical investigation dangerous.

A strange yacht ignores Frank and Joe's distress call during a storm, and a wallet full of money appears beside their boat. These puzzling incidents lead into a case involving a missing pilot and a mysterious siren.

Frank and Joe join their science teacher on an archaeological expedition out West. A sabotaged flight and warnings to leave Wildcat Swamp turn the trip into a dangerous investigation, but the brothers refuse to abandon the search.

Frank and Joe investigate a missing deed that threatens a man's claim to his land. A dishonest salesman's scheme and their father's secret sabotage case add further complications, leaving the brothers to untangle several apparently separate problems.

Gregory Woodson asks Frank and Joe to help find his grandfather's missing will, which may determine the future of Woodson Academy. A strange letter offers a clue, while someone willing to use violence tries to stop their search.

Frank and Joe receive a trained falcon that proves useful in tracking messages sent by carrier pigeons. Their investigation leads toward a smuggling gang and a captive Indian prince, making each intercepted message a possible step toward rescue.

Two medallions vanish from an inherited collection of curios, sending Frank and Joe on a search for answers. Their investigation takes them to Guatemala, where dangerous thieves pursue a treasure and put the brothers' lives at risk.

A mysterious businessman hires Frank and Joe to locate an old Spanish cannon. Stolen cars and suspicious encounters make the assignment seem increasingly dubious, while their underwater search brings hazards that go well beyond finding a relic.

A coded letter from their father sends Frank and Joe to Puerto Rico with their friends. The investigation draws them toward a criminal plot involving an atomic bomb, turning a puzzling message into a race to prevent disaster.

A friend's urgent telegram brings Frank and Joe to Alaska, where attacks and a missing explorer complicate their investigation. A map and a piece of jade offer clues, leading the brothers toward the remote formation called Devil's Paw.

Frank and Joe buy a Chinese junk to run a passenger service and earn extra money. Several strangers show unusual interest in the vessel, raising suspicions that their new business has brought them into a much larger mystery.

Frank and Joe search the California desert for missing industrialist Willard Grafton. Their investigation leads across the border into Mexico and toward a gang plotting to defraud the government, making the disappearance more than a simple rescue case.

Strange screams and disappearances bring Frank and Joe to Black Hollow in the Pocono Mountains. When the retired police captain they came to help also vanishes, the brothers must look past local ghost stories to find him.

Frank, Joe and Chet travel to Canada's Northwest Territories in pursuit of a stolen Viking runestone. Their search overlaps with thefts from lodges around Great Slave Lake, turning the missing artifact into part of a broader investigation.

Frank and Joe investigate paintings stolen from an art school's sponsor near supposedly haunted Fort Senandaga. One picture may hold a clue to hidden gold, but threats and traps make searching for both paintings and treasure a dangerous task.

A traveler's will directs Frank and Joe to return a valuable object to the descendant of an Aztec warrior. With neither object nor owner clearly identified, they follow clues into Mexico while a threatening gang obstructs their search.

After their father is kidnapped, Frank and Joe pursue the saboteurs responsible. Their investigation reveals a threat to a bridge being built near Boontown, Kentucky, forcing them to protect the construction project while following the kidnappers' trail.

A job watching for pickpockets at a carnival draws Frank and Joe into a larger mystery. The disappearance of a stuffed whale and suspicious whale tattoos provide unusual clues as the brothers investigate the crimes around them.

A magician's vanishing act takes a disturbing turn when Fenton Hardy disappears and fails to return. Frank and Joe suspect kidnapping, and investigating the performer leads them toward an international gang and a flight that may hold answers.

Frank and Joe fly to Iceland to locate a sailor wanted by an insurance company. Their search becomes dangerous almost immediately, drawing them into an espionage plot that threatens an American astronaut and the country's moon program.

Frank and Joe investigate stolen mercury shipments and a missing government missile. Clues lead toward Baltimore's waterfront and an Indian freighter, while the developing case reveals a terrorist threat that makes stopping the thieves especially urgent.

Frank, Joe, Chet and Biff camp in the Rocky Mountains while searching for credit card counterfeiters. Stolen sapphires and trouble around their campsite turn the outing into a dangerous pursuit along the ominously named Vampire Trail.

Frank and Joe search for a wealthy industrialist's missing son, following the trail to Brazil. Clues uncovered by Chet's golf-ball collecting hobby help connect the disappearance to criminals who provide new identities for people fleeing the law.

Frank and Joe help their Greek pen pal search for an ancient helmet lost after being loaned to a film company. Harassment during a summer filmmaking course accompanies a trail that leads from the campus to California and Greece.

Frank and Joe become involved with a wealthy balloonist and a valuable chess trophy targeted by thieves. When the prize disappears, their investigation takes them to Hong Kong, where an international criminal operation lies behind the unusual clues.

A winter vacation in Jamaica becomes an investigation when an ancient death mask is found near the Hardy brothers' beach house. Following its secrets leads Frank and Joe far beyond the island and into a dangerous international adventure.

Sent to England to help Professor Rowbotham, Frank and Joe investigate strange events connected with a witchmaster and a missing nobleman. Their search leads toward Ireland, where a shipwreck and a secret coven complicate the case.

Stolen gold bullion and a missing museum artifact draw Frank and Joe into an international investigation. Clues take the brothers through Switzerland and into Mexico, where a lost pyramid in the Yucatan becomes central to their search.

A rocket scientist disappears before an important launch at Woomera in Australia. Helping their father investigate, Frank and Joe must find the missing man while threats and interference endanger both the launch and their own lives.

An explosion aboard an airship carrying wild animals catches the Hardy brothers' attention while their father investigates a terrorist gang. Suspicious incidents at a new zoo suggest that the boys' case may connect with his dangerous assignment.

A Japanese businessman disappears while under Fenton Hardy's protection, and a valuable samurai sword is stolen from a New York gallery. Frank and Joe investigate the possible connection, following clues that place them in increasing danger.

A wolf-like creature terrorizes a small town during the full moon, casting suspicion on a young man whose family has a werewolf legend. Frank and Joe investigate to clear his name as the attacks put them at risk.

The search for a stolen painting takes Frank and Joe to Florida, where suspected smugglers operate along the coast. Working in disguise, the brothers follow clues into the Everglades while trying to stay ahead of dangerous enemies.

Frank and Joe search for a missing young woman who may have joined a sinister cult. Meanwhile, a comic publisher asks them to investigate a destructive figure resembling his Apeman character, giving the brothers two unusual cases.

Five Egyptian statuettes disappear from a museum, sending Frank and Joe to Egypt to investigate. Asked to protect a mysterious mummy during the journey, they become entangled in an international theft case that follows them onto the Nile.

Frank and Joe investigate stolen antique weather vanes in Pennsylvania Dutch country while their father searches for a missing Navy employee and a secret Pentagon document. The brothers must determine how the two cases fit together.

The disappearance of an ancient stone idol draws Frank and Joe into a search that begins in an Andean village. Their investigation carries them to Antarctica and Easter Island, where appearances may conceal the truth behind the theft.

Frank and Joe pursue a criminal who has turned an invention intended for peaceful use toward dangerous ends. Their investigation brings them up against the Four-Headed Dragon, a secret organization operating behind the Iron Curtain.

A cryptic warning from their father sends Frank and Joe to Washington, D.C., where bomb threats and a stolen diamond create overlapping mysteries. The recurring infinity symbol may help them understand the danger and clear themselves of suspicion.

A centuries-old letter points Frank and Joe toward lost silver in New Jersey's Pine Barrens. Despite a threatening call from someone claiming to be the long-dead outlaw, they investigate amid smugglers, ghostly appearances, and tales of the Jersey Devil.

In Germany, Frank and Joe help a reporter investigate the theft of plans for a miniature submarine. Missing paintings and coins introduce another mystery, leaving the brothers to follow clues through cases that may be connected.

Chet's cousin loses a rare coin intended for his uncle in California, while a car theft gives the Hardy brothers another problem. Frank and Joe travel west to investigate the missing valuables and pursue the thieves.

Mysterious accidents threaten to keep a college football star out of a championship game. Frank and Joe investigate who is targeting the player and why he downplays the threats, as their inquiry reveals a potentially wider danger.

Strange incidents disrupt a magicians' tournament, drawing Frank and Joe into an investigation where appearances are especially difficult to trust. The case escalates into a kidnapping involving the President, forcing the brothers to confront a much larger threat.

An antique-store robbery leaves Frank and Joe facing questions about their failed surveillance. Meanwhile, threats against a friend's grandfather suggest a voodoo curse, pulling the brothers into an investigation involving stolen objects and an unusual ransom demand.

A defecting spy, missing emeralds, and a terrorist network place Frank and Joe in a dangerous investigation. Tic-tac-toe symbols appear among the clues, forcing the brothers to decipher the pattern while confronting the threat of explosives.

A suspicious forest fire threatens a Vermont home, and its owner believes a Revolutionary War soldier has returned from the dead. Frank and Joe investigate the apparent haunting while trying to discover who is responsible for the danger.

A truck hijacking draws Frank and Joe into an undercover investigation of stolen cargo. Following the thieves leads them aboard a ship, where the brothers face a dangerous operation involving nuclear weapons and threats far beyond Bayport.

When actor Richard Chase is abducted in Los Angeles, Fenton Hardy sends Frank and Joe to investigate a movie location in California. Their search for clues becomes personal when the brothers themselves are seized during the case.

Joe overhears a suspicious payment that connects an explosives expert with a satellite company. The brothers travel to Florida to investigate possible sabotage at a launch, while stolen marine animals introduce another puzzling strand to the case.

While protecting a jewel collector's Arizona ranch, Frank and Joe encounter suspicious attacks and the theft of a ruby called the Crimson Flame. Tracking the thieves takes them to Thailand, where they continue their search for the missing stone.

Strange events at Blackwing Mansion suggest that the house may be haunted. Frank and Joe investigate the disturbances while helping their father pursue a ring of thieves, trying to untangle the apparent haunting from the criminal activity.

While vacationing in Vermont, Frank and Joe volunteer to help police find a missing camper. The search draws them into a case involving a doomsday cult and dangerous bacteria, with sinister events suggesting more than an ordinary disappearance.

Frank and Joe witness masked attackers trying to steal a canoeist's life jacket, setting off an unusual investigation. Whitewater rafting in Maine becomes linked with a Washington bank robbery as the brothers follow the clues.

Frank, Joe, and Chet escort Nikki through the jungles and deserts of Zebwa, an African country ruled by dictators. Reaching the forces fighting to restore democracy means protecting her from enemies connected to her father's assassination.

A series of suspicious accidents threatens the space shuttle Skyfire and draws Frank and Joe to Cape Canaveral. As the brothers train for a shuttle mission, they investigate sabotage linked to their father's pursuit of industrial spies.

Frank and Joe travel to Big Thicket, Texas, where a naturalist's efforts to protect local wildlife have made him a target. Investigating attempts on his life brings the brothers into conflict with powerful timber and oil interests.

Suspicious accidents and malfunctioning equipment threaten the CompuCar Company, which manufactures computer-operated automobiles. Frank and Joe investigate the apparent sabotage, trying to discover who is turning the factory's robots into a danger before the business is destroyed.

Frank and Joe help Keith, a cyclist riding an experimental bicycle called the Silver Star, after repeated unexplained accidents interrupt his ride. When the bicycle is stolen, their investigation takes a more dangerous turn than they expected.

Frank and Joe attend a Bayport baseball camp run by former major-league players, expecting a chance to improve their game. Collapsing bleachers, dangerous pitching machines, and exploding baseballs instead lead them to investigate a crime syndicate operating around the camp.

Frank and Joe enter Philadelphia's police academy under assumed names to investigate accusations against the commissioner's grandson. As they look into the apparent setup, the brothers uncover connections to their father's dangerous investigation of a gangster.

Frank and Joe are hired to invent a crime and plant clues for a mystery weekend. When an actual crime interrupts the entertainment, their staged evidence puts them under suspicion, forcing the brothers to solve the case to protect themselves.

A dangerous snake causes panic at Bayport Zoo, and snakes discovered in Phil Cohen's basement make him the leading suspect. Frank and Joe believe their friend is innocent and investigate who is using the stolen reptiles to frame him.

Threats against karate champions and armory robberies along a martial-arts tour draw Frank and Joe into a new investigation. Following the connections takes them toward the Japanese underworld, where ninja masters become dangerous opponents for the brothers.

A warehouse explosion leaves young Trusty Teens worker Jimmy Quayle accused of attempted murder. Frank and Joe infiltrate the company to investigate, discovering that the business employing teenage door-to-door salespeople has a secret operation behind its ordinary products.

A Wyoming camping trip turns dangerous when masked men attack Frank and Joe in a national park. Their investigation leads to an illegal toxic-waste dump, where further violence and a threatening rockslide put their lives at risk.

Frank and Joe take small roles in a Bayport community theater production, only to find a thief operating around the players. Their investigation must protect the company while separating staged drama from crimes threatening the real performers.

A criminal calling himself the Masked Marauder threatens to blow up a television station. Frank and Joe must investigate the threat and identify the person behind the disguise before the planned attack puts the station and its people in danger.

A Wizards and Warriors game sends Frank and Joe searching for a missing player in an abandoned mine. When the entrance collapses, they must solve the game master's clues while confronting traps, hidden tunnels, and a more serious mystery.

An anonymous warning threatens Bayport's Founders' Day fireworks, directing Frank and Joe toward Old Glory Fireworks. Their filming assignment gives them access to the factory, where a suspicious safety failure raises questions about who wants the celebration disrupted.

Someone is attacking leading competitors before an international windsurfing contest for the Almanarre Cup. Frank and Joe travel to the south of France to investigate, hoping to identify the culprit before the competition brings further danger to its entrants.

Frank and Joe join Bayport's volunteer firefighters during winter break, only to find an arsonist targeting a developer's warehouses. Their investigation follows evidence of blackmail and revenge as the fires threaten more than the property already destroyed.