Books like The London Deception by Franklin W. Dixon

Frank and Joe are playing Wizards and Warriors in an abandoned mine when the entrance caves in, trapping them. Now, unless they uncover the identity of a mysterious Secret Wizard Master, they may never see daylight again! - Publisher.

While on a cross-country skiing trip into the Colorado Rockies, the Hardys' conservationist friend is critically shot. The brothers trail the suspect, but the sniper isn't about to give in without a fight--and Frank and Joe become fair game.

Frank and Joe Hardy become involved in an intriguing mystery which revolves around their fencing master, Ettore Russo. Proof that Russo is the rightful heir to his grandfather's estate hinges on retrieving the guard end of a broken saber lost many years ago in California. The young investigators' quest is complicated by a bank robbery during which some of their father's important records are stolen. Using Mr. Hardy's recently purchased scientific device, a sound spectrograph, the boys identify the voiceprints of the leader of the masked robbers. A chase ensues that takes Frank, Joe, and their pal Chet Morton to the grape-growing region of California and involves them in a dangerous game of hide-and-seek with the bank robbery gang, who also are searching for the broken saber. A startling discovery at a movie location leads to the solution of this thrilling, fast-paced mystery. - Flyleaf.

Strange events involve Frank and Joe Hardy in a mystery which shrouds an ancient treasure -- the golden head of the Pharaoh Rhamaton IV. First, a cryptic unsigned warning from Egypt; second, the ghost of a bloodthirsty pirate of the eighteenth century, who, according to legend, haunted nearby Whalebone Island years ago and recently has reappeared. The owner of the million-dollar golden Pharaoh's head claims it was aboard the freighter Katawa, which sank not far from Whalebone Island. But suspicious developments indicate that Mehmet Zufar may be trying to defraud the shipping line's insurance company. Frank and Joe enthusiastically accept the challenge of their famous detective father to assist him in investigating the complex case for Transmarine Underwriters. A puzzling clue leads the Hardys to Whalebone Island, where they almost lose their lives in a violent explosion. Someone desperately wants to get rid of them. But who? Is it the ghostly pirate? Frank and Joe's perilous scuba-diving search in the ocean depths off the island yields electrifying discoveries that cap the climax of this exciting mystery. - Flyleaf.

In a world of wizards and warriors, two shining knights - Frank and Joe - take a stand of honour and courage, raising lance and shield against their elusive enemy, the Knight of the Flaming Sword. But the sun is rapidly setting on Avalon and one sword stroke could cast them back into the Dark Ages.

A search for truth leads Frank and Joe into a tunnel of toxic terrors.

When a young computer expert and friend of Frank Hardy is poisoned, Frank and Joe access his computer to find the answers. Frank is about to go online to talk with his computer whiz pal Jim Lerner when a message flashes across his screen: HELP! I THINK I'M DYING! The Hardy Boys rush to Jim's house, where they find him unconscious, the victim of a life threatening poison! Frank and Joe suspect that Jim stumbled onto an international smuggling ring, but the key to the case is locked away in his floppy disks. They have only one week to break the program's code and to find the vital antidote to the poison! If they fail, this is one computer virus that could lead to TERMINAL SHOCK.

In this all-new adventure, the Hardys have been invited to attend the Bayport Motor Speedway to test-drive the prototype of a world-class sports car. But when the high-performance racer vanishes without a trace, Frank and Joe's investigation leads to the demolition derby, where they run head-on into danger.

When her starring role in the production of a murder mystery at Bayport's Grand Theater is marred by threatening notes, Callie turns to her boyfriend, Frank Hardy, to find out who is responsible.

THE LOCAL HALLOWEEN CONTEST IS TURNING INTO A REAL FRIGHT FEST! Bayport citizens are wild about the Merchant Association's new Halloween mystery contest. The prizes for winning include DVD players, a classic motorcycle, a boat, and even flying lessons! It's sure to be the biggest social event of the fall season. When big prizes are up for grabs, though, some people will do anything to win -- and it's up to the Hardys to keep the competition honest. As they try to keep things in line, the Hardy boys and their friends contend with spooky settings, fright-masked bandits, a chase through the Halloween parade, and a horror movie star with secrets "buried" in his past. Soon it looks like the bad guys have this contest in the bag. Fortunately, the good guys -- Frank and Joe -- still have a few tricks left!

On the high wire of foreign affairs, one slip can lead to disaster! The Hardys and friend Callie Shaw are off to Washington, D.C. Callie finally has the chance to meet her Parisian pen pal, Madeleine Berot, whose parents have been assigned to the French embassy. But when Maddy is caught shoplifting, Frank and Joe suspect that there's something rotten in the state of French diplomacy. Determined to get to the bottom of the Madeleine Berot mystery, the Hardys find themselves caught in a web of international intrigue. They take of on a tingling chase through the nation's capital, pursuing a gang of continental con artists. In a case of D.C. deceit, it's up to Frank and Joe to nip the caper in the bud!

A quarter of a million in cold cash - that's how much an unknown extortionist is demanding to insure the safety of the monster truck and hot rod show at the Bayport Arena. Promoter Grant Tucker asks Frank and Joe to go underground and crush the crooked plot before the cook delivers a crushing blow.

Publisher's summary: Taking a skiing vacation in the Canadian Rockies, Frank and Joe find themselves investigating a local bank robbery and running from a suspect when they accidentally stumble on an isolated cabin.

The Hardys get a call for help from their friend Phil Cohen: seems his cousin, a project manager at a software company, can’t find Steven Royal, the eccentric designer of the company’s popular Chaos games. Is his disappearance a move in a deadly real-life game?

Hiking the Appalachian Trail with their friends, Chet, Phil, and Biff, the Hardys hit a snag when daredevil Biff gets hurt. The old mining town of Morgan's Quarry is the nearest place for help. But even the run-down, isolated town turns menacing when two tough locals drop a bag full of money in front of the brothers! Joe and Frank are stonewalled when they ask about the money. The roads are washed out, the phones are down, and a crumbling mansion hides a gold mine of secrets. Every fork in the road leads to more danger...and everyone in Morgan's Quarry seems bent on makng sure the boys don't make it out alive!

The Hardys get an anonymous tip--someone is out to sabotage Bayport's annual fireworks celebration. Investigating the threat, they go undercover as video filmmakers doing a documentary on the Old Glory fireworks plant.

The Hardys get an anonymous tip--someone is out to sabotage Bayport's annual fireworks celebration. Investigating the threat, they go undercover as video filmmakers doing a documentary on the Old Glory fireworks plant.

Frank and Joe travel to Mexico to search for hidden secrets at an archaeological dig. When ancient artifacts are stolen from the site, the boys search for clues but discover they must be careful--or they could be buried alive.

When the Hardy's investigate a missing game show host, their investigation leads them to a tangled web of danger, deceit and dirty tricks.

An urgent call for help from their father's friend, chemist Sam Gentle has drawn Frank and Joe across country to northern Arizona.

The Hardys go undercover to locate the saboteur responsible for the Lone Star Oil Company's frequent "accidents". But when Frank and Joe are left alone on a rig as a storm closes in, they realize a bomb has been planted. If it goes off, the Hardys--and all sea life in the Gulf--will be history.

When Frank and Joe go to New York for a magic seminar, they have to learn the tricks of the trade in order to track down a safecracker.

Nightmare, a million dollar racehorse, and Julian Ardyce, the man accused of stealing her, haven't been seen for three years. While on vacation in San Francisco, the Hardys spot Ardyce on the street and decide the time has come to put an end to the case of the thoroughbred theft. But a million bucks buys plenty of trouble. Battling runaway cable cars and the cold currents off Alcatraz Island, the boys discover that it's easier to corral a pack of wild horses than to uncover the truth behind the million dollar nightmare. - Back cover.

Frank and Joe must catch a villain calling himself the Masked Marauder before he blows up a television station.

Frank and Joe are an accident waiting to happen when they go undercover to expose sabotage at the Shorewood Nature Center.

The landmark Tower Mansion, site of the Hardy boys' first triumph, is being converted into condos. Construction workers find a treasure map and Frank and Joe try to find the treasure, only to run across a modern day pirate who is determined to keep the secret to himself.

The Hardys go to bat against a major league team of counterfeiters There's trouble in the cards when Frank, Joe and their friend Biff visit a baseball memorabilia convention in New York City. Biff buys a hard-to-find card only to learn that it's a counterfeit and that more than a few bucks are at stake. The card may be a fake, but the danger to Biff and to the Hardys is as real as it gets. Frank and Joe discover that the baseball card scam is just the beginning - a very small slice of a very criminal pie. And when that much is on the line, the Hardys know they'd better be ready to play some serious hardball

The Hardy Boys head to Oklahoma, where crime is spinning out of control in the wide-open spaces of tornado alleyFrank and Joe encounter a bizarre phenomenon: the aftermath of a fierce twister that defies scientific explanation. To get at the truth, the Hardys will have to put themselves in the path of destruction -- and face the explosive fury of a criminal mastermind!

Joe Hardy makes the cut in Southern California's Mountain Annihilator mountain bike competition, and discovers that someone is serious about eliminating the competition.

As part of a school project, the Hardy brothers are observing a criminal trial for murder but they think the defendant is innocence and set out to prove it.