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!

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!

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?

It’s a case of hidden identities for brother detectives Frank and Joe in the in the eighteenth book in the thrilling Hardy Boys Adventures series. The Hardy brothers and Frank’s new girlfriend, Jones, are attending a local comic book convention on the shore. They meet up with Jones’s friend Harper, a fellow comics super fan, on the boardwalk outside the convention. The four of them spend hours running from booth to booth and end the perfect day with pizza at Harper’s short-term rental apartment. Things don’t stay so perfect, though. On the way home, Jones realizes she switched phones with Harper by accident and she is getting some really scary texts. When they show up at the apartment the next day, they find it totally destroyed and Harper is missing. Frank and Joe start digging into their new friend’s life, hoping to find out where she might have gone, but the more they find out about her, the more mysterious she becomes. Can Frank and Joe find this secretive character? Or has she disappeared forever?

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?

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?

Detective brothers Frank and Joe investigate a crime of smashin’ in the tenth book in the interactive Hardy Boys Clue Book series. Frank, Joe, and their best friend Chet are attending Bayport Zoo’s annual Halloween carnival. Frank and Joe have a routine planned for Scaryoke, and Chet has entered the pumpkin pie-eating contest—he even brought his own whipped cream! After their performance, Frank and Joe go to check out the painted pumpkins on display. But when the brothers enter the tent, they see their Scaryoke song wasn’t the only smash hit at the carnival. The floor is littered with bits of pulverized pumpkins! What’s worse, the organizer says that unless the culprits are caught by the end of the day, this will be the last Boo at the Zoo…forever! Can Frank and Joe find out what happened before it’s too late? Or is this pumpkin crime unpatchable?

Detective brothers Frank and Joe weed out a vandal in the fifteenth book in the interactive Hardy Boys Clue Book series. Frank and Joe Hardy have been hard at work turning their front yard into an eco-friendly edible landscape garden thanks to a contest sponsored by the Bayport Science Center. Frank’s really been enjoying learning about how to make the garden thrive, while Joe likes all of the cool critters and, of course, getting to munch on all of the yummy food. When the prize vegetables being grown in some of the top competitors’ gardens are attacked, at first it looks like hungry pests have been having a feast. But as Frank and Joe unearth more evidence, it appears those cucumbers aren’t being crunched by creatures with a craving. No, the veggies are the target of a clever saboteur. The Hardys will have to figure out who’s been destroying the gardens fast, before their friends’ chances of winning the contest are shredded like lettuce.

The third book of the Blair-witch-like abduction trilogy. Frank has been discovered at long last and may posess key answers to questions that will solve the mystery of the LOST abductions once and for all.

Harriet sets out to solve a poisoning on Marble Island in the third book in the acclaimed cozy mystery series from award-winning author Elana K. Arnold. There are some things you should know about Harriet Wermer: She used to lie a lot, but not anymore. Seriously, she only tells the truth now. Even though she hadn't wanted to come to Marble Island in the first place, now she doesn't want to leave. It's the truth. With her mom and new baby brother home from the hospital, it's almost time for Harriet to pack up and head home from Marble Island and all the friends she's made. But Harriet doesn't have time to think about that--not when she discovers that Moneypenny, her Nanu's adorable basset hound, has been poisoned! Harriet suspects the culprit is one of the guests staying at Nanu's bed-and-breakfast, and she and her best friend, Clarence, are once again on the case. But when someone else falls ill, Harriet's going to have to sleuth harder, spy sneakier, and be willing to see that sometimes the truth is more complicated than it seems.