Franklin W Dixon Books in Order

The headmaster of Willis Firth Academy and his daughter are in danger, and Frank and Joe may be targets too. The brothers must finish their undercover investigation before the threats turn into a loss of life.

Frank disappears in the woods while the brothers investigate mysterious child abductions. Joe must find him and stop him from joining the missing children known as the LOST, with his brother's safety depending on the search.

Nine-year-old Frank and eight-year-old Joe discover part of a treasure map. To have a chance of locating the treasure, they must enlist their friends' help and track down the pieces still missing from their clue.

Frank and Joe camp in woods where children vanish after the word LOST appears outside their tents. When an L appears outside the brothers' own tent, their investigation becomes a threat to their personal safety.

A teammate's lucky baseball mitt disappears before the season's final game. Frank and Joe must investigate its loss and recover it in time, with the player convinced their Little League team's prospects depend on its return.

Nine-year-old Frank and eight-year-old Joe compete at their local arcade, where they discover a problem that needs investigating. The brothers begin testing their own detective abilities, inspired by the work of their father.

The actor who plays Morpho the Morph Monster arrives for a fan event, but his famous Morph Spork disappears. Frank and Joe must recover the missing prop before the theft forces the entire occasion to stop.

With Frank finally found, the brothers return to the mystery of children abducted in the woods. His experience may provide crucial answers, but they still need to uncover the truth behind the unsettling LOST disappearances.

Frank and Joe pose as extras on Deathstalker to investigate threats against its star, Anya. An attempt to burn her trailer makes the danger concrete, and the brothers must uncover who is disrupting the movie.

Anya continues receiving threatening messages while Frank and Joe work undercover on Deathstalker. Keeping her safe at a comic convention is only part of their task, as the ongoing attacks threaten to stop the movie's production.

During Bayport's Junior Bike Race, Frank suffers a puncture and then discovers his bicycle is missing. When the obvious suspect proves innocent, Frank and Joe must reconsider who could have taken it and recover the bike.

New student Max claims he can make anything disappear, but Frank and Joe remain skeptical. When a prized show dog repeatedly vanishes and returns, they investigate whether the young magician is responsible for the strange events.

Frank and Joe look forward to hearing Crush at Bayport's Battle of the Bands, where their friend's brother plays bass. When his guitar disappears before the performance, they investigate rival musicians and suspects closer to home.

Deathstalker begins filming, but the threats against actress Anya continue despite Frank and Joe's protection. Working undercover as extras, the brothers must identify the person behind the attacks before the movie suffers another dangerous disruption.

Someone sabotages the equipment for Bayport Elementary's Field Day, leaving rackets ruined, ropes tangled, and balloons flattened. Frank and Joe investigate to save the competition and the prizes their excited classmates hope to win.

Phil enters an amusement park's competition to design a new ride, hoping to win passes for himself and the Hardys. When his coaster entry is damaged in a locked room, Frank and Joe investigate.

Frank and Joe win a chance to handle a superhero balloon in Bayport's parade. When someone tears it and Joe is blamed, the brothers must identify the saboteur quickly to clear his name.

Amusement park owner Hector Rodriguez's daughter Daisy disappears without a trace. With another disappearance already linked to Funspot, Frank and Joe face a troubling investigation while Hector fears the park's earlier incident makes him responsible.

A film crew brings a zombie movie to Bayport, exciting Frank, Joe, and their friends. When someone reports a real zombie away from the set, the brothers investigate whether the sighting is a prank or something stranger.

Videos of violent pranks spread through Bayport after Lindsay Peyton's expensive car is vandalized. Frank and Joe investigate the Scaredevils, whose escalating acts threaten Lindsay and the elaborate sixteenth-birthday party she is planning.

Frank, Joe, and Phil build a robot they hope will finally win the Bayport Science Fair. When it disappears from Phil's garage just before the competition, the brothers investigate rival students and a bully to recover their missing creation.

Frank and Joe's supposed retirement ends when alarming pranks in Bayport develop into crimes with real victims. What begins with a filmmaker's staged scares leads the brothers toward a dangerous gang, forcing them to protect their town and themselves.

A newly renovated amusement park promises to save Daisy's family from financial ruin, and Frank and Joe attend its opening night. When a rider disappears from its popular attraction, the brothers must find the missing person before disaster closes the park.

Bayport celebrates a historic warship's discovery with a Revolutionary War reenactment, but a supposedly unloaded musket kills a prominent benefactor. Frank and Joe investigate when a favorite teacher becomes a suspect, questioning whether someone has used the celebration to frame him.

Frank and Joe hope to win a tent-decorating competition during a camping event at Bayport State Park. Missing decorations, strange noises, and unusual footprints turn the trip into an investigation of whoever is sabotaging the campers' preparations.

A museum field trip lets Frank and Joe's science club join a fossil dig, where Tico discovers a valuable dinosaur tooth. When it disappears after a dispute over who found it, the brothers must investigate beyond the most obvious suspect.

A blizzard strands Frank and Joe at Granite Peak Lodge, where dangerous incidents begin threatening guests and staff. With roads closed and the resort apparently under sabotage, the brothers must identify the culprit before another mishap becomes fatal.

Frank's aquarium internship and Joe's scuba lessons turn into a mystery when a rare sea turtle disappears. Discovering tunnels beneath Bayport suggests the aquarium connects to a smuggling operation, sending the brothers in search of its hidden organizers.

Frank and Joe join their family on a Caribbean cruise filled with entertainment, including performances by former pop singer Izzy. When his valuable pocket watch is stolen, the brothers must identify the thief before the ship reaches its next port.

Frank and Joe become extras in a zombie movie filming in Bayport, enjoying a change from detective work. A dangerous stunt failure reveals sabotage, drawing them into an investigation to protect the production and everyone working on it.

Chet wins a golden ring and tickets at Bayport's medieval fair, beating the school bully in a junior jousting contest. When the prize disappears during the celebration, Frank and Joe must recover it before the main tournament begins.

A series of thefts points to a recently released criminal known as the Phantom, but Frank and Joe cannot find him. Threatening riddles suggest an ancient emerald is his next target, giving the brothers a code to crack before another robbery.

Television wildlife performers bring exotic animals to Bayport Elementary, delighting Frank, Joe, and their classmates. When Bubba the boa constrictor disappears from both his cage and the performers' van, the brothers must track the missing snake before trouble follows.

A prank disrupts Chet's campaign speech during the Bayport Elementary elections, threatening his chance to win. Frank and Joe investigate who sabotaged their friend's appearance, trying to identify the culprit while the election is still underway and votes remain undecided.

A sinkhole swallows a historic Bayport statue, leading Frank and Joe into a network of caves and tunnels. Beneath the town they discover an abandoned city occupied by criminals planning a takeover, making their investigation increasingly dangerous.

Frank and Joe are surprised when their principal puts them on the basketball team despite their lack of skill. He wants them to investigate masked players who abduct and intimidate newcomers, turning a school activity into a dangerous undercover case.

When a rodeo visits Bayport, Frank and Joe stop ranch hands from stealing a prized horse. Helping drive cattle back to the ranch brings further suspicious events, leaving the brothers to investigate a mystery that extends beyond the attempted theft.

Frank plans backstage work and Joe practices juggling for Bayport Elementary's talent show, but rehearsals are disrupted by pranks. Sabotaged music, a bubbling trumpet, and hair dye give the brothers clues to whoever is threatening the performances.

A school camping expedition on Black Bear Mountain turns frightening when a teacher disappears and blood marks his tent. Stranded without a way to call for help, Frank and Joe search the wilderness amid bears and rumors of a violent madman.

The Bayport Bandits begin their Little League season with a new playbook full of strategies, but it disappears after a team celebration. Frank and Joe must recover their coach's plans before the first big game puts their teammates to the test.

Bayport Elementary holds a raffle to fund a school trip, with a coveted video game system as its best prize. When the console disappears during the event, Frank and Joe search for the thief before the fundraiser's success is jeopardized.

Joe brings new water skis on a class trip to Lake Poketoe, eager to try them out with his friends. When they vanish before the first boating session, he and Frank investigate the theft before their visit ends.

Frank and Joe visit Paris as an elaborate fireworks display conceals the theft of a priceless artifact. Suspicion falls on Joe's favorite street artist, but the brothers question the accusation and follow clues through the city's art world and underground passages.

Frank and Joe support Skeeter the skateboarding cat in Bayport's contest, hoping he can beat the school bully. A toy mouse interrupts his final trick, giving the brothers reason to suspect someone deliberately sabotaged the unusual competitor.

Sightings of a sasquatch-like creature bring crowds and media attention to Bayport, challenging Frank and Joe's skepticism. When friends report attacks and the brothers encounter more than one creature, they investigate what is behind the growing fear.

A class trip to Bayport Bear Park includes a scavenger hunt with prizes for the fastest team. When the children return to find goodies destroyed and others missing, Frank and Joe investigate who has turned the contest into a theft.

Pages from a stolen Sherlock Holmes manuscript keep appearing among Frank and Joe's belongings, suggesting someone is framing them. The brothers recruit young skateboarders as observers, borrowing Holmes's tactics to track an elusive opponent who keeps working through intermediaries.

Frank and Joe visit a favorite writer's estate after his sudden death, where thefts and strange events convince his widow the house is haunted. His assistant asks for help, but an injury deepens the mystery the brothers hoped to explain.

Jason wins a treasure map at Bayport's pirate festival, then abandons the hunt after apparent warnings from a pirate ghost. Frank and Joe suspect someone is staging the haunting to claim the treasure and set out to expose the trick.

Phil's science-fair time machine makes Chet's hamster disappear, leaving Frank and Joe skeptical that it traveled into the past. Photographs showing the hamster in historical costumes challenge their explanation as they search for the missing pet and the truth.