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.

Ben Ripley may only be in middle school, but he's already pegged his dream job: CIA or bust. Unfortunately for him, his personality doesn't exactly scream "secret agent". In fact Ben is so awkward, he can barely get to school and back without a mishap. Because of his innate nerdiness, Ben is not surprised when he is recruited for a magnet school with a focus on science - but he's entirely shocked to discover that the school is actually a front for a junior CIA academy.

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.

In the small city of Strattenburg, there are many lawyers, and though he’s only 13 years old, Theo Boone thinks he’s one of them. Theo knows every judge, policeman, court clerk - and a lot about the law. He dreams of being a great trial lawyer, of a life in the courtroom. But Theo finds himself in court much sooner than expected. Because he knows so much - maybe too much - he is suddenly dragged into the middle of a sensational murder trial.

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.

Amy and Dan find themselves in a new global race but this time, everything’s different. Those closest to them might be working for the enemy, and Amy and Dan are forced to ask themselves how far they’re willing to go to save the kidnapped Cahills. How much can you risk when there’s no one to trust?

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.