The Hardy brothers must dismantle a dangerous crime gang in this first book of a fresh approach to a classic series. Teenagers Frank and Joe Hardy are supposedly “retired” from their detective work. But there is a new mystery in Bayport that needs their investigative expertise—and fast! Starting with a bank heist, a series of alarming pranks have popped up around Bayport. Ultimately harmless, the pranks turn out to be the work of Seth Diller, an amateur filmmaker who plans to make “zillions” from his reality-horror flick, which he’ll use to help out his brother, a wounded Marine. But after the Hardy brothers put a stop to the Panic Project, there is a new outbreak of Seth-like pranks—only these have definite victims. All signs point to evidence of a crime gang in Bayport, and Frank and Joe undertake the most dangerous investigation they’ve ever encountered. It’s up to them to save their town—and themselves—before the Red Arrow gets to them first.

Frank and Joe Hardy follow dangerous copycat pranks to a criminal group; identify the culprits who key an expensive car and post a video on the Internet; and investigate the disappearance of an amusement park patron.

A criminal that seems to be straight out of a Sherlock Holmes novel is out to get brother detectives Frank and Joe in the sixteenth book in the thrilling Hardy Boys Adventures series. An original Sherlock Holmes manuscript was stolen from the Bayport Museum and now pages keep showing up in Frank and Joe’s things: their lockers, menus, even the backseat of their car. It’s clear someone is out to frame them. But who could it be? The boys try their usual means of deduction, but everything leads to a dead end. They just keep finding unsuspecting people who were paid to hide the pages by a mysterious third party. Frank recognizes this tactic—it’s exactly what Moriarty would do to throw off Sherlock Holmes. So the brothers decide to use one of Sherlock’s signature ideas: The Baker Street Irregulars. Though instead of street kids, Frank and Joe use a group of skateboarding tweens to keep their eyes and ears open around town. It’s a battle of wits as the brother detectives try to clear their name. But this Moriarty wannabe always seems to be one step ahead. Can the Hardy boys find the real culprit before it’s too late?

Bayport High's Green Environment Conservation Club is camping on Black Bear Mountain, but the bears aren't the only danger--rumor has it that a madman with a taste for human flesh lurks in the nearby forest. When the campers awake one morning to find a bear roaming the campsite, they also find that their teacher is missing ... and blood is streaked across his tent. Frank and Joe go in search of him, but can they survive the dangers on the mountain?

Brother detectives Frank and Joe search a hidden castle for clues to help them find a missing comic book in the nineteenth book in the thrilling Hardy Boys Adventures series. Frank and Joe have been hanging out at Sir Robert’s Comic Kingdom, the local comic and gaming shop, and got the exclusive invite to this year’s Halloween costume ball at Bayport’s one and only castle. Sir Robert plans to use the big event to unveil his most prized possession, a super rare comic that is rumored to contain a map to buried treasure. Sir Robert agrees to show his store regulars—who now include Frank and Joe—a sneak preview of the comic before the party. But when he goes to unlock the fireproof casing, he finds the book is gone. It will take all of Frank and Joe’s recently acquired LARPing skills to solve this case. Anything can happen in a castle full of dungeons and deception. Can the Hardy boys keep up?

Frank and Joe must take the shine off a jewel thief who sends ominous riddles in this Hardy Boys adventure. First a priceless painting disappears from the museum; then two ancient samurai swords vanish from a private collection. A string of robberies has hit Bayport, and all signs point to “the Phantom,” a recently released ex-con who last struck more than twenty years ago. There’s only one problem: the Phantom has vanished into thin air, and not even Frank and Joe Hardy can track him down. Then the boys begin receiving threatening notes in the mail, each one containing a strange riddle. And it looks like the Phantom’s next target could be the valuable Emerald of Astara, the 2,500-year-old crown jewel of the Bayport Historical Museum. Can the Hardys crack the Phantom’s code before he strikes again?

The Hardy brothers investigate after the world's most expensive pen is stolen from their hotel in Paris. Everyone thinks that the thief is the celebrated graffiti artist, Le Stylo, but the brothers are not convinced.

Brother detectives Frank and Joe face the dangers of Black Bear Mountain once again in the twentieth book in the thrilling Hardy Boys Adventures series. Frank and Joe are back on Black Bear Mountain, the scene of a previous wilderness adventure and mind-bending mystery. This time, the brothers are checking in on Dr. K, a friend they made during their first trip. Dr. K is a fan of living off the grid, but he’s been MIA long enough to cause worry in the small mountain town. And so the teenage detectives Black Bear Mountain relied on before have been called in to help once again. It’s not a good start to the investigation when Frank and Joe’s ATV is put out of commission by a falling tree. Then their camp, including their radio—their only way to contact the outside world—is destroyed by wildlife searching for food. And when they finally reach Dr. K’s research station, they find his cabin has been cleaned out and abandoned—the only current resident is an angry skunk. Frank and Joe may have been better prepared for their second Black Bear Mountain adventure, but they’re not having any more luck this time around. In fact, they’ve been downright unlucky. Is someone trying to sabotage their mission? And if they are, how can the brothers stop this invisible foe?

Brother detectives Frank and Joe dive deep into the Florida Keys to find a missing person in the twenty-first book in the thrilling Hardy Boys Adventures series. Frank and Joe Hardy have been invited to take part in a conservation mission by a marine biologist at the Bayport Aquarium. The boys get to go on an all-expenses paid trip to the lush and beautiful Florida Keys to help save sharks! But the trip’s purpose is suddenly sidelined when a paddle boarder goes missing and rumors start that the disappearance is the result of a shark attack. After spending so much time learning about the local shark population, the Hardy Boys aren’t buying the story. It will take all of Frank and Joe’s recently acquired knowledge about sharks and their habitat to solve this case. Will they be able to discover what’s really going on before it’s too late?

The Hardy brothers investigate after reports of a beast attacking people. Is the Bayport Beast real after all?