On the day they are born, every Swift child is brought before the sacred Family Dictionary. They are given a name, and a definition. A definition it is assumed they will grow up to match. Meet Shenanigan Swift: Little sister. Risk-taker. Mischief-maker. Shenanigan is getting ready for the big Swift Family Reunion and plotting her next great scheme: hunting for Grand-Uncle Vile’s long-lost treasure. She’s excited to finally meet her arriving relatives—until one of them gives Arch-Aunt Schadenfreude a deadly shove down the stairs.

Orphan Elizabeth Somers’ malevolent aunt and uncle ship her off to the ominous Winterhouse Hotel, owned by the peculiar Norbridge Falls. Upon arrival, Elizabeth quickly discovers that Winterhouse has many charms - most notably its massive library. It’s not long before she locates a magical book of puzzles that will unlock a mystery involving Norbridge and his sinister family.

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.

Janner Igiby, his brother, Tink, and their disabled sister, Leeli, are gifted children as all children are, loved well by a noble mother and ex-pirate grandfather. But they will need all their gifts and all that they love to survive the evil pursuit of the venomous Fangs of Dang, who have crossed the dark sea to rule the land with malice. The Igibys hold the secret to the lost legend and jewels of good King Wingfeather of the Shining Isle of Anniera.

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.

Middle school is hard. Solving cases for the FBI is even harder. Doing both at the same time - well, that's just crazy. But that doesn't stop Florian Bates! Get to know the only kid on the FBI director's speed dial - and several international criminals' most wanted lists - in this adventurous series that School Library Journal says combines "elements of Alex Rider, James Bond, and Sherlock Holmes".

Twelve-year-old Sophie has never quite fit into her life. She’s skipped multiple grades and doesn’t really connect with the older kids at school, but she’s not comfortable with her family, either. The reason? Sophie’s a Telepath, someone who can read minds. No one knows her secret - at least, that’s what she thinks.... But the day Sophie meets Fitz, a mysterious (and adorable) boy, she learns she’s not alone. He’s a Telepath too, and it turns out the reason she has never felt at home is that, well...she isn’t. Fitz opens Sophie’s eyes to a shocking truth....

This summer the Penderwick sisters have a wonderful surprise: a holiday on the grounds of a beautiful estate called Arundel. Soon they are busy discovering the summertime magic of Arundel's sprawling gardens, treasure-filled attic, tame rabbits, and the cook who makes the best gingerbread in Massachusetts. But the best discovery of all is Jeffrey Tifton, son of Arundel's owner, who quickly proves to be the perfect companion for their adventures.

Welcome to the Sweet Tooth Ice Cream & Candy Shoppe, where the confections are a bit on the... unusual side. Rock candy that makes you weightless. Jawbreakers that make you unbreakable. Chocolate balls that make you a master of disguise. Four young friends - Nate, Summer, Trevor, and Pigeon - meet the grandmotherly Mrs. White, owner of the Sweet Tooth, and soon learn about the magical side effects of her candies.

When their grandmother Sylvie is rushed to the hospital, Ivy Sparrow and her annoying big brother Seb cannot imagine what adventure lies in store. Soon their house is ransacked by unknown intruders, and a very strange policeman turns up on the scene, determined to apprehend them with a toilet brush. Ivy and Seb make their escape only to find themselves in a completely uncommon world, a secret underground city called Lundinor where ordinary objects have amazing powers.

"Are you a gifted child looking for special opportunities?" Dozens of children respond to this peculiar ad in the newspaper and are then put through a series of mind-bending tests, which readers take along with them. Only four children—two boys and two girls—succeed. Their challenge: to go on a secret mission that only the most intelligent and inventive children could complete. To accomplish it they will have to go undercover at the Learning Institute for the Very Enlightened, where the only rule is that there are no rules.

Edie Burchill and her mother have never been close, but when a long lost letter arrives one Sunday afternoon with the return address of Milderhurst Castle, Kent, printed on its envelope, Edie begins to suspect that her mother’s emotional distance masks an old secret.

Xanthe has always had an affinity with some of the antiques she finds. When she touches them, she can sense something of the past they come from and the stories they hold. When she has an intense connection to a beautiful silver chatelaine, she has to know more. It is while she’s examining the chatelaine that she’s transported back to the 17th century, where it has its origins. She discovers there is an injustice in its history. The spirit that inhabits her new home confronts her and charges her with saving her daughter’s life, threatening to take Flora’s if she fails.

Chess has always been the protector over his younger siblings, Emma loves math, and Finn does what Finn does best - acting silly and being adored. They’ve been a happy family, just the three of them and their mom. But everything changes when reports of three kidnapped children reach the Greystone kids, and they’re shocked by the startling similarities between themselves and these complete strangers. The other kids share their same first and middle names. They’re the same ages. They even have identical birthdays. Who, exactly, are these strangers?

Discover what James Patterson calls “the coolest library in the world” in the New York Times bestselling, award-winning Mr. Lemoncello’s Library series!