Book 1

Trouble at the Arcade

by Franklin W. Dixon

Published 27 April 2010
The first book in the chapter book refresh of the classic Hardy Boys series.

In Trouble at the Arcade, nine-year-old Frank and eight-year-old Joe Hardy discover trouble lurking at the local arcade and decide they make pretty good detectives-just like their dad!

Book 2

The Missing Mitt

by Franklin W. Dixon

Published 27 April 2010
In The Missing Mitt, the boys must help their teammate find his lucky mitt before the last game, or their Little League season is doomed!

Book 3

Mystery Map

by Franklin W. Dixon

Published 17 August 2010
In Mystery Map, nine-year-old Frank and eight-year-old Joe Hardy get their hands on a piece of a treasure map. But they'll need to work with their friends and hunt down the rest of the map in order to have a chance at finding the treasure. Let the sleuthing begin!

Book 4

Hopping Mad

by Franklin W. Dixon

Published 14 September 2010
In The Missing Mitt, the boys must help their teammate find his lucky mitt before the last game, or their Little League season is doomed!

Book 5

When the actor who plays popular comic character Morpho the Morph Monster comes to town for a fan day--along with his famous Morpho Mask and Morph Spork--everyone, including Frank and Joe, is excited to meet the man behind the mask. But at the event, Morpho's Spork goes missing! And until the Spork is returned, the entire event will be put on hold! It's up to Frank and Joe to crack the case--and return the Spork to its rightful owner!

Book 6

The Bicycle Thief

by Franklin W. Dixon

Published 9 August 2011
It's time for the annual Junior Bike Race in Bayport, and Frank and Joe are the top contenders. Midway through the race, Frank runs over a nail and blows a tire. It seems as if the day couldn't get worse--until Frank's bicycle goes missing!

Bayport's leading bully, Adam Ackerman, seems to be the prime suspect. But when he proves that he wasn't the bicycle thief, everyone turns out to be a potential culprit--even Mr. Mack's dog, Lucy! Can Frank and Joe crack the case and bring Frank's bicycle home?

Book 7

The Disappearing Dog

by Franklin W. Dixon

Published 18 October 2011
In Hopping Mad, the boys have to figure out a way to stop their school talent show from being ruined—by raining frogs! Let the sleuthing begin!

Book 8

Sports Sabotage

by Franklin W. Dixon

Published 3 April 2012
Frank and Joe bring their detective skills to the athletic arena in this all-new Hardy Boys Secret Files mystery!

It's time for Field Day at Bayport Elementary and all the kids are excited! Whatever grade wins gets a pizza party, and the person with the highest personal score also gets a special prize. But when the field equipment is sabotaged the day before the events are supposed to start, it looks like Field Day might not happen after all-unless someone can find out who is behind the mess of ruined rackets, tangled jump ropes, and flattened balloons. Can Frank and Joe crack the case and save Field Day?

Book 9

The Great Coaster Caper

by Franklin W. Dixon

Published 7 August 2012
Everyone’s favorite young detective duo is in for wild ride in this all-new Hardy Boys Secret Files mystery!

Frank and Joe are excited to learn that Thrill Kingdom, their local amusement park, is having a contest for kids to design a brand-new ride. And they’re even more excited that their friend Phil is entering! The prize? Free passes to the park for the winner and two friends—aka, two Hardy brothers!
     But on the day of the contest, someone ruins Phil’s roller coaster contest entry. Since it had been kept in a locked room while awaiting final judging, everyone is confused as to who could have found their way inside. It’s up to Frank and Joe to figure out the twists and turns of this coaster caper!

Book 10

A Rockin' Mystery

by Franklin W. Dixon

Published 16 October 2012
In this Hardy Boys Secret Files mystery, a missing bass guitar causes a few wrong notes at the Battle of the Bands.

Frank and Joe are thrilled to learn that the popular band, Crush, is scheduled to perform in Bayport's huge Battle of the Bands-and even more excited when they find out that their friend's brother, Dylan, is the bass guitarist. But on the day of the performance, Dylan's prized guitar has gone missing!
Could someone from a rival band have taken it in hopes of gaining an advantage? Or could the culprit be someone closer to home? It's up to Frank and Joe to investigate this rocking mystery-or else Crush might be crushed in the competition!

Book 11

Robot Rumble

by Franklin W. Dixon

Published 2 April 2013
A robot robbery suggests science fair foul play in this Hardy Boys Secret Files mystery.

It’s time for the annual Bayport Science Fair, and Frank, Joe, and their friend Phil are determined to have the winning entry. With their spiffy homemade robot, they are convinced they can finally top their classmate, Cissy Zermeno, who has won the past two years.

But right before the boys are about to bring Mr. Roboto to the fair, Phil discovers that their prized creation has gone missing! Did town bully (and usual suspect) Adam Ackerman steal him out of jealousy? Or was Cissy worried she would have to settle for second place this year?

It’s up to the boys to figure out how Mr. Roboto found his way out of Phil’s garage. Will they get him back in time to compete?

Book 12

The boys track down an unusually undead suspect in this Hardy Boys Secret Files mystery.

Bayport is buzzing with excitement when a film crew sets up shop to film the latest zombie flick. Frank, Joe, and their friends are really psyched that there will be fake zombies running around town—not to mention a famous director and some of their favorite actors. They are hoping for a sighting or two, and maybe even an autograph, if they’re lucky!

But things get a little too real when one of the boys’ friends claims he saw an actual zombie in Bayport—nowhere near the shoot. Is someone just pulling a crazy prank? Or is the movie starting to take on a life of its own?

Book 13

Balloon Blow-Up

by Franklin W. Dixon

Published 3 December 2013
Frank and Joe are on a case that really pops in this Hardy Brothers Secret Files Mystery.

The Green Crawler is one of the coolest superheroes around, and Frank and Joe are some of his biggest fans. And thanks to a contest, the Hardy boys get to be two of the handlers for the new Green Crawler balloon in the annual Fall Festival parade in Bayport!

But the day before the parade, disaster strikes: someone has ripped the Green Crawler balloon! The people in charge think Joe did it—and the Hardys need to clear his name fast. Was it Bayport bully Adam Ackerman, who was green with envy that the Hardys won the contest? Or could the culprits be loyal fans of Nutty the Squirrel, the cartoon character whom the Green Crawler replaced? And Mo Mantis, the Green Crawler’s archenemy, has a few tricks of his own…

Can the brothers figure out who tried to ground the Green Crawler? Or will Joe and Frank be watching the parade from the sidelines this year?

Book 14

Fossil Frenzy

by Franklin W. Dixon

Published 29 April 2014
Attending a science club field trip to the Bayport Museum of Natural History, Frank and Joe visit a fossil dig on the museum grounds where Tico and Aisha fight over which of them discovered a dinosaur tooth.

A missing dinosaur tooth makes for a massive investigation in this Hardy Boys Secret Files mystery. Book #14

Book 15

Ship of Secrets

by Franklin W. Dixon

Published 5 August 2014
Frank and Joe solve a mystery on the high seas in this Hardy Brothers Secret Files adventure.

It's finally summer vacation, and the Hardy family is headed on a cruise to the Caribbean. As they board the ship with their parents, Frank and Joe can't believe all the fun that's in store for them. There are three-story slides, playgrounds, ball pits, four pools, and an arcade. There are concerts and magic shows at night, while jugglers and clowns wander the deck during the day.

In addition to all of the fun, the Hardys discover that former pop idol and lead singer of the Lightening Bolts, Izzy, is now performing on the ship. That night, as the family eats dinner, they hear a commotion at the other end of the massive dining room. Someone has stolen a very valuable and sentimental pocket watch from Izzy. Can Joe and Frank solve the case before the ship docks in the first harbor? Or will time run out on this case?

Book 16

Camping Chaos

by Franklin W. Dixon

Published 2 December 2014
During the the annual "Fun With Camping" event at Bayport State Park, Frank and Joe investigate when tent decorations start to go missing and they find mysterious footprints around the camp.

"Frank and Joe are excited to go camping with their friends in Bayport State Park for the annual "Fun With Camping" event. They are ready for hiking, bonfires, and s'mores--and especially for the tent decorating competition, which the boys are determined to win. But just a few nights into the trip, decorations start to go missing. First Frank and Joe hear strange noises outside their tent. Then they see a set of unique footprints at the campsite. It seems like someone--or something--is out to sabotage the decorating contest. Can Joe and Frank figure out who the campsite culprit could be?" --

During the annual Fun with Camping event at Bayport State Park, Frank and Joe investigate when tent decorations start to go missing and mysterious footprints are found around the camp. Book #16

Book 17

The Great Escape

by Franklin W. Dixon

Published 21 April 2015
When wildlife celebrities come to Bayport Elementary, Frank and Joe are soon on the case of a missing snake in this Hardy Brothers Secret Files adventure.

Jumpin’ Jack and his son, Little Jim, have been on television for years, taming tigers and wrestling alligators, but now they’re bringing their traveling menagerie to schools—and Bayport Elementary is next!

During the event, they show students a baby kangaroo, a boa constrictor, a flying squirrel and other exotic animals. Frank, Joe, and their friends are all having a great time, until they realize Bubba the Boa is missing! He’s not in his cage or in Jack’s giant van. Can they figure out what happened to this slippery snake before it’s too late?

Book 19

The Race Is on

by Franklin W. Dixon

Published 1 December 2015
Frank and Joe vote to solve the mystery of who sabotaged their friend's election speech in this Hardy Boys Secret Files adventure.
The Bayport Elementary elections are coming up, and Chet Morton is running for class president against Cissy Cimero. Frank and Joe have done everything they can to help their friend. They've made posters, handed out buttons, and helped him write one of the best campaign speeches in Bayport history. When the day of the election finally comes, they know every vote will count.
But when Chet gets a rude surprise during his speech, everyone is shocked. Who would want to ruin Chet's speech? And how did he or she manage to pull off the prank? Can Frank and Joe figure out what happened before the election is called in Cissy's favor?