Samantha Spinner's Uncle Paul has gone missing again. But this time, he left behind a yellow mitten and a note: Watch out for the snow! That's weird, especially because they're in Seattle...and it's the middle of summer! Samantha has defeated ninjas, battled clowns, and faced down daredevils. But with the sinister snow, she may have met her math!* A puzzling uncle, a mission to Michigan, and a mysterious mitten. Let's hope Samantha's super-annoying brother can lend her a hand with...the perplexing pants! *That's a super-secret clue.

Avery Grambs has a plan for a better future: Survive high school, win a scholarship, and get out. But her fortunes change in an instant when billionaire Tobias Hawthorne dies and leaves Avery virtually his entire fortune. The catch? Avery has no idea why - or even who Tobias Hawthorne is. To receive her inheritance, Avery must move into sprawling, secret passage-filled Hawthorne House, where every room bears the old man's touch - and his love of puzzles, riddles, and codes.

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.

When girl Detective Friday Barnes solves a bank robbery she uses the reward money to send herself to the most exclusive boarding school in the country, Highcrest Academy. On arrival, Friday is shocked to discover the respectable school is actually a hotbed of crime. She's soon investigating everything from disappearing homework to the Yeti running around the school swamp. That’s when she’s not dealing with her own problem - Ian Wainscott, the handsomest boy in school, who inexplicably hates Friday and loves nasty pranks.

In June, 1954, eighteen-year-old Emmett Watson is driven home to Nebraska by the warden of the juvenile work farm where he has just served fifteen months for involuntary manslaughter. His mother long gone, his father recently deceased, and the family farm foreclosed upon by the bank, Emmett's intention is to pick up his eight-year-old brother, Billy, and head to California where they can start their lives anew. But when the warden drives away, Emmett discovers that two friends from the work farm have hidden themselves in the trunk of the warden's car.

Sebastian, Dana, and Clark are like any other kids—if you don't count their spaceship! Get ready to inspire your little listener as they follow these thrilling adventures across the globe….

At nine years of age, Logan Weber knows the routine. Keep quiet, make the food last, and don’t ever cause trouble. He’ll do what it takes to evade the rages of his troubled, violent father. Even though he’s only a child, Logan already knows too much - has seen too much. So when the opportunity presents itself, Logan runs. He has no idea where his journey will lead, or that the grandmother he’s been told is dead is desperately searching for him. Alone with no home of his own, Logan looks for a safe place to hide.

The Whippet Hotel is a strange place full of strange and mysterious people. Each floor has its own quirks and secrets. Leo should know most of them - he is the maintenance man's son, after all. But a whole lot more mystery gets thrown his way when a series of cryptic boxes are left for him... boxes that lead him to hidden floors, strange puzzles, and unexpected alliances. Leo had better be quick on his feet, because the fate of the building he loves is at stake... and so is Leo's own future!

Twelve-year-old Nova is eagerly awaiting the launch of the space shuttle Challenger - it's the first time a teacher is going into space, and kids across America will watch the event on live TV in their classrooms. Nova and her big sister, Bridget, share a love of astronomy and the space program. They planned to watch the launch together. But Bridget has disappeared, and Nova is in a new foster home. While foster families and teachers dismiss Nova as severely autistic and nonverbal, Bridget understands how intelligent and special Nova is, and all that she can't express.

Hank Zipzer: He's smart. He's creative. He's funny. His pencils are sharpened. His binders are bound. He wants to do well in school, he really does. He tries not to be lazy, like his parents claim he is. So why is he always getting into trouble?

Rex Walker always wanted to be like his father: a daring, adventurous man, traveling the world in pursuit of mysterious relics. While teaching anthropology at a Boston college, Rex attempts to bury the past, until he discovers a hidden clue he can’t ignore. With the help of a former student, he teams up with an alien-obsessed billionaire, and they search for the fabled Bridge. As an unidentified object nears Pluto, speculation surges. Some hail it as the homecoming of a distant alien race, and this cult is unwavering in their efforts to usher our world into a new era.

On February 29th, at 4:23 p.m., everyone in the Bailey family over the age of twelve gets a superpower. No one knows why, and no one questions it. All the Baileys know is that it's their duty to protect the world from those evil, supervillainous Johnsons. Today, Rafter Bailey and his brother Benny are finally going to get their superpowers. Benny wants to be a speedy, and Rafter hopes he gets his grandpa's super strength so he can save the day just like him. But when their powers arrive, they are - well - duds.

Keenan has lived all over the world but nowhere quite as strange as Centerlight Island, which is split between the US and Canada. The only thing weirder than Centerlight itself is his neighbor Zarabeth, a.k.a. ZeeBee. ZeeBee is obsessed with the island’s history as a Prohibition-era smuggling route. She’s also convinced that her beloved dog, Barney, was murdered - something Keenan finds pretty hard to believe. Just about everyone on Centerlight is a suspect, because everyone hated Barney, a huge dog - part mastiff, part rottweiler - notorious for terrorizing the community.

Go to The Dancing Men and ask for a saucer of milk for your snake. Then all will be revealed. That’s all the note says - before the ink disappears! Xena and Xander Holmes think living in London will be boring. But when they discover they’re related to Sherlock Holmes and inherit his unsolved casebook, life becomes much more exciting. The siblings set out to solve the cases their famous ancestor couldn’t, starting with the mystery of a prized painting that vanished 1000 years ago. Can two smart 21st-century kids succeed where the celebrated Sherlock Holmes could not?

It was 1798 when the Morningstarr twins arrived in New York with a vision for a magnificent city: towering skyscrapers, dazzling machines, and winding train lines, all running on technology no one had ever seen before. Fifty-seven years later, the enigmatic architects disappeared, leaving behind for the people of New York the Old York Cipher - a puzzle laid into the shining city they constructed, at the end of which was promised a treasure beyond all imagining.