Something is not right in Bayport. After a series of unfortunate (yet harmless) pranks, it looks like Frank and Joe have caught their suspect surprisingly early. Their classmate, Seth Diller, has taken his love of filmmaking a bit too far. But shortly after Frank and Joe confront Seth, there are fresh outbreaks of Seth-like pranks. Except these aren't as harmless. After a bit of investigating, the Hardy Boys uncover evidence of the Red Arrow - a group that will stop at nothing to bring chaos and crime to Bayport's peaceful existence.

When a thief steals the Applegate siblings' jewel collection from the Tower Mansion, the whole town of Bayport is left buzzing with questions. Who could have stolen it, and where could it be hidden? The Hardy boys are determined to find out, especially when their friend's father, Henry Robinson, is wrongly accused of the crime! From dusty old towers to secret secret passages, Frank and Joe will follow every clue they can to clear Mr. Robinson's name and reveal the true thief.

Dear Diary...Bess, George, and I are actually in Alaska! Everywhere you look, there are massive mountains and sparkling, deep-blue waters. We're on the maiden voyage of the Arctic Star luxury cruise ship, and my old friend, Becca Wright, the assistant cruise director, needs our help. She received threatening emails before even setting sail; then a bloody body turned up in the swimming pool.

What would happen if you discovered that your family was one of the most powerful in human history? What if you were told that the source of the family's power was hidden around the world, in the form of 39 Clues? What if you were given a choice - take a million dollars and walk away...or get the first Clue? If you're Amy and Dan Cahill, you take the Clue - and begin a very dangerous race.

Before Jake’s grandfather died, he was on the trail of a centuries-old mystery. And he has entrusted that mystery to Jake, leaving behind a set of hidden codes, riddles, maps, and other clues that lead Jake and his friends on a scavenger hunt into the heart of Colorado’s wild and rugged Rocky Mountain National Park.

When an oil spill takes place off the coast of Connecticut, the Aldens are happy to volunteer to help clean up the animals affected, including a rare species of shore bird. But could more have been done to prevent the spill? As the Aldens take up the case, it leads them on an adventure to help other endangered animals around the world.

Before they were the Boxcar Children, Henry, Jessie, Violet, and Benny Alden lived with their parents on Fair Meadow Farm. Although times are hard, the Aldens are happy - “the best family of all,” Mama likes to say. One day, a blizzard hits the countryside, and a traveling family needs shelter. The Aldens take them in, and the strangers soon become friends. But things never stay the same at the farm, and the spring and summer bring events that will forever change their lives.

Sara Martinez is a hacker. She recently broke into the New York City foster care system to expose her foster parents as cheats and lawbreakers. However, instead of being hailed as a hero, Sara finds herself facing years in a juvenile detention facility and banned from using computers for the same stretch of time. Enter Mother, a British spy who not only gets Sara released from jail but also offers her a chance to make a home for herself within a secret MI5 agency. Operating out of a base in Scotland, the City Spies are five kids from various parts of the world.

Ten-year-old George Calder can't believe his luck - he and his little sister, Phoebe, are on the famous Titanic, crossing the ocean with their aunt Daisy. The ship is full of exciting places to explore, but when George ventures into the first-class storage cabin, a terrible boom shakes the entire boat. Suddenly water is everywhere, and George's life changes forever.

It's a tough job, but somebody's got to do it. Guts, glory, danger, and sacrifice are all in a day's work for Hank the Cowdog, Head of Ranch Security. While investigating a murder on the ranch, Hank finds himself the number-one suspect.

In Dinosaurs Before Dark, adventure is waiting to happen! Jack and his younger sister, Annie, stumble upon a tree house filled with books. Where did the tree house come from? How long has it been there? When Jack reads a book about the Cretaceous period, 65 million years ago, and wishes he could really see the pteranodon, it suddenly appears at his window. Magically. Before Jack and Annie can figure out the mystery, the tree house whisks them back to the prehistoric past.

Twelve-year-old Theodore “Teddy” Roosevelt Fitzroy believes that Henry, the hippopotamus at the brand-new FunJungle, has been murdered. The zoo’s top brass claim the hippo went belly up the natural way, but Teddy and his feisty friend Summer McCraken have other ideas. Could the culprit be FunJungle’s animal-hating head of operations? Or is it FunJungle’s owner - Summer’s dad - a man who is much more concerned about money than animal welfare? The deeper Teddy and Summer dig, the more danger they’re in - because when it comes to hippo homicide, the truth can’t be caged!

Jake and Taylor Wilder have been taking care of themselves for a long time. Their father abandoned the family years ago, and their mother is too busy working and running interference between the boys and her boyfriend, Bull, to spend a lot of time with them. Thirteen-year-old Jake spends most of his time reading. He pores over his father's journal, which is full of wilderness facts and survival tips. Eleven-year-old Taylor likes to be outside playing with their dog, Cody, or joking around with the other kids in the neighborhood. But one night everything changes.

Making a living reproducing famous artworks for a popular online retailer and desperate to improve her situation, Claire is lured into a Faustian bargain with Aiden Markel, a powerful gallery owner. She agrees to forge a painting - a Degas masterpiece stolen from the Gardner Museum - in exchange for a one-woman show in his renowned gallery. But when that very same long-missing Degas painting is delivered to Claire's studio, she begins to suspect that it may itself be a forgery. Her desperate search for the truth leads Claire into a labyrinth of deceit where secrets hidden since the late 19th century may be the only evidence that can now save her life.

In the first volume of a new series for younger listeners, Nancy gets to show off her sleuthing abilities while at her friend Deirdre's sleepover. Everyone's excited for pizza, cake and even a movie. But when Deirdre's Hollywood Heather doll goes missing, the fun stops, and,Nancy springs into action.

Dear Diary...Bess, George, and I are actually in Alaska! Everywhere you look, there are massive mountains and sparkling, deep-blue waters. We're on the maiden voyage of the Arctic Star luxury cruise ship, and my old friend, Becca Wright, the assistant cruise director, needs our help. She received threatening emails before even setting sail; then a bloody body turned up in the swimming pool.

Aidan and Meg Falconer are their parents' only hope. The Falconers are facing life in prison -- unless Aidan and Meg can follow a trail of clues to prove their innocence. The problem? Right now they're trapped in a juvenile detention center. Until they escape one night -- and find themselves on the run, both from the authorities and from a sinister attacker who has his own reason to stop them.

With the defeat of the Overtakers behind them, the five teenagers known as the Kingdom Keepers should be celebrating. By all accounts they saved Disneyland from certain destruction. Why then did their mentor leave one last puzzle for them to decipher? The Keepers must solve a puzzle of the past, or be crushed under an evil that makes the Overtakers seem like gentle souls.

Annie's got bad news for her ex-boyfriend, curator Ernst Pettigrew: the snooty Brock Museum's new 15-million-dollar Caravaggio painting is as fake as a three-dollar bill. And the same night Annie makes her shattering appraisal, the janitor on duty is killed - and Ernst disappears. To top it all off, a well-known art dealer has absconded with multiple Old Master drawings, leaving yet more forgeries in their places. Finding the originals - and pocketing the reward money - will get Annie's new landlord off her back.

When a forgotten journal materializes decades after Drake Ramsey's father vanished in the Amazon jungle, Drake decides to follow in his footsteps and search for the legendary treasure of the Inca empire hidden in the lost Inca city of Paititi.

The globe-trotting thief in the red fedora returns! And now, the question isn't where—but who? In the role of Carmen Sandiego, award-winning performer Kyla Garcia reveals, for the very first time, the backstory of the ever-elusive master criminal whose whereabouts captured the imaginations of children everywhere—through educational video games, animated series, and a popular PBS "gameshow" for middle schoolers in the 1990s.

M.J., her partner Gilley, and their client, the wealthy, de-lish Dr. Steven Sable, are at his family's lodge, where his grandfather allegedly jumped to his death from the roof-although Sable says it was foul play. But the patriarch's isn't the only ghost around. The place is lousy with souls, all with something to get off their ghoulish chests. Now M.J. will have to quell the clamor-and listen for a voice with the answers...

DiGriz is caught during one of his crimes and recruited into the Special Corps. Boring, routine desk work during his probationary period results in his discovering that someone is building a battleship, thinly disguised as an industrial vessel. In the peaceful League no one has battleships anymore, so the builder of this one would be unstoppable. DiGriz' hunt for the guilty becomes a personal battle between himself and the beautiful but deadly Angelina, who his planning a coup on one of the feudal worlds.

Growing up, Bianca St. Ives knew she was different from all her friends. Instead of playing hopscotch or combing her dolls' hair, she studied martial arts with sensei masters and dismantled explosives with special-ops retirees. Her father prepped her well to carry on the family business. Now a striking beauty with fierce skills, the prodigy has surpassed the master.

Young widow Penelope Thornton-McClure and her old Aunt Sadie are making ends meet by managing a mystery book shop - a quaint Rhode Island landmark rumored to be haunted. Pen may not believe in ghosts, but she does believe in good publicity - like nabbing Timothy Brennan for a book signing. But soon after the bestselling thriller writer reveals a secret about the store's link to a 1940s murder, he keels over dead - and right in the middle of the store's new community events space. Who gives Mrs. McClure the first clue that it was murder?

The first to disappear is a ski instructor in the secluded mountains of Colorado. Hours later, a pregnant woman is abducted from a crowded hospital. Two places, two incidents, a single motive. And so it begins....

The Team: Financed by a billionaire philanthropist, this elite team - a soldier, an historian, a computer whiz, a weapons expert, and a thief - is tasked with finding the world's most legendary treasures. The Mission: Fearing a German victory in WWI, the Romanian government signed a deal with Russia to protect the country's treasures. In 1916, two trains full of gold and the most precious possessions of the Romanian state - paintings, jewelry, and ancient artifacts - were sent to the underground vaults of the Kremlin....

Meg Langslow's summer is not going swimmingly. In her small Virginia hometown, she's the maid of honor at the nuptials of three loved ones - each of whom has dumped the planning in her hands. One bride is set on including a Native American herbal purification ceremony while another wants live peacocks on the lawn. But when an offensive newcomer, who hints at skeletons in the guests' closets, is found dead under suspicious circumstances, level-headed Meg's to-do list extends from flower arrangements and bridal registries to catching a killer - before the next event is her own funeral.

Toby Harbinger, an eighth grader at Hubble Middle School near Washington, D.C., is in big trouble. He made the mistake of selling his dad's priceless original Star Wars blaster to a lunatic who thinks he's Darth Vader and travels with a large, hairy sidekick known as the Wookiee. Now the lunatic wants more from Toby, whose only hope of getting out of this mess is to win first prize at the school science fair: $5,000.

The title character from ABC's hit television series Castle kicks off his new series of books featuring tough and sexy New York police detective Nikki Heat with a bang.