Embarking on a class trip to Bayport Bear Park, Frank and Joe join in an exciting scavenger hunt before learning that the prizes slated for the winning team have been stolen or destroyed by an unknown culprit.

Detective brothers Frank and Joe must solve another intriguing mystery in the fifth book in the interactive Hardy Boys Clue Book series. Frank and Joe are excited for the class trip to Bayport Bear Park. When they arrive, the entire class is greeted with a beautiful sight: a pile of prizes and goodies in the middle of the room! Their guide, Marnie, explains that they will be split into teams to complete a scavenger hunt through the park. Whoever solves the clues the fastest will win all of the prizes. But after they come back from solving the first few clues, the entire pile of prizes has been destroyed, with half of the loot completely missing! Can Frank and Joe figure out who the Treat Thief is and save the trip?

Frank and Joe are on the hunt for "buried treasure" during a school trip--and find a mystery to solve instead!

Detective brothers Frank and Joe work to uncover a pirate ghost hoax in the seventh book in the interactive Hardy Boys Clue Book series. The Hardy Boys are super excited when their friend Jason Wang wins the “Talk Like a Pirate Contest” at Bayport’s annual Pirate Palooza. Jason’s prize is a map to the legendary pirate, Captain Scurvydog’s buried treasure. Expert detectives Frank and Joe offer to help him find it. But the next day, Jason tells the brothers that he won’t be doing any treasure hunting. He says the ghost of Captain Scurvydog has been haunting him; his parrot is singing pirate songs he’s never been taught, pirate coins appeared on his windowsill, and there’s a mysterious note in a bottle warning Jason to stay away from buried treasure. To Jason, the message is clear: stay away from Captain Scurvydog’s booty! Frank and Joe don’t believe in ghosts. They’re sure someone is tricking Jason so they can dig up the buried treasure themselves. The only question is, who?

"Tells the story with the gripping pace of a true-crime 'Ocean's Eleven.'" The New York Post • "Like a diamond, this true-life caper is clear, colorful, and brilliant." Publishers Weekly ★Starred Review★ The Antwerp Diamond Center was one of the most secure buildings in the world. With hundreds of millions of dollars' worth of diamonds stored in its subterranean vault, it had to be. Located in the heart of Belgium's ultra-secure Antwerp Diamond District, it benefited from two police stations, armed patrols, extensive video surveillance, and vehicle barriers securing an area where 80 percent of the world's diamonds traded hands. But on February 15, 2003, a band of skilled Italian thieves — fronted by the charming Leonardo Notarbartolo, who spent over two years clandestinely casing the building — subverted every one of the Diamond Center's defenses and made off with a record amount of loot. Experts estimate they got away with nearly half a billion dollars in diamonds, cash and other valuables. They'd pulled off the biggest heist in history--everybody loves diamonds and they now had more than any thief before them. The robbers did it with stealth and smarts; no one was hurt or even threatened during what was quickly labeled the largest diamond heist in history. The bandits — members of a group of professional thieves known as "The School of Turin" — used cunning in lieu of violence, successfully evading security cameras, thwarting an array of electronic sensors, and penetrating a vault protected by a double-locked foot-thick steel door. Even when the police zeroed in on who committed the crime, how it was done remained a mystery, like something out of a heist movie or TV show. Flawless is a fast-paced global scavenger hunt uncovering the truth behind the daring Valentine's Day weekend heist. Tracking clues, sources, and documents throughout Europe — from seedy cafés in Turin, Italy to sleek diamond offices in Antwerp, Belgium — authors Scott Selby and Greg Campbell retrace Notarbartolo's careful discovery of the building's security flaws. They recreate the heist and its aftermath — detailing how the thieves brilliantly neutralized each element of the security protecting the Diamond Center's vault while inviting the readers into the secretive world of diamonds and diamond dealing. The result is a thrilling ride through the better-than-fiction heist of the century. "Fans of caper books and movies will be in seventh heaven." Booklist ★Starred Review★

Detective brothers Frank and Joe must solve a muddy mystery in the ninth book in the interactive Hardy Boys Clue Book series. Bayport Elementary is hosting a Mud Run to celebrate spring! A particularly muddy part of the town’s park will be set aside for the race and Coach Lambert has even managed to make more mud by using the park’s hoses and shovels. Frank and Joe can’t wait to splash through the muck. But on the day of the race, the runners are stopped in their tracks by croaking, blurping bullfrogs! Lots of people in the town had been annoyed that the park was being taken over by a bunch of muddy kids. Could someone have sabotaged the race with buckets of frogs?

Includes an excerpt of the Hardy Boys clue book #3, Water-ski wipeout.