Twelve-year-old Kyle gets to stay overnight with other students in the new town library designed by his hero (the famous game-maker Luigi Lemoncello) but come morning, the doors are locked, and he must work with friends to solve puzzles to escape.

From tales of hapless superheroes and stolen squirrel monkeys to murderous triplets and haunted basements, these thrilling, puzzling, and hilarious cases have one thing in common—YOU get a chance to be the detective before the author reveals the solution.

Told from separate viewpoints, Chess, Emma, and Finn Greystone, ages twelve, ten, and eight, investigate why their mother went missing and uncover their ties to an alternate world.

Introducing Myrtle Hardcastle, your favorite new amateur detective: a wickedly smart twelve-year-old with a keen interest in criminology and a nose for murder.  When she learns her neighbor in quiet Swinburne, England, a breeder of rare flowers, has died, she is sure it was murder and that she must find the killer.

Twelve-year-old Ru reluctantly joins her parents in Scotland for the summer, where she and her new friends Dax and Hammy Beans search for the Loch Ness Monster.

Eight-year-old Ada, who has a knack for science, math, and solving mysteries, teams up with her best friend, Nina, to find a missing dog.

This story alternates between the detective work of middle-schooler Jesse and her new friend, Springer, after her father is accused of stealing, and the post-tornado rescue efforts of Jesse and her Pomeranian, Sam-Sam.

Thirteen-year-old Theodore Boone has always dreamed of being a great trial lawyer someday, but a sensational murder trial forces him into the arena sooner than expected.  A cold-blooded killer is about to go free, and only Theo knows the truth.

While on a mission aboard The Emperor of the Seas, Ben Ripley faces off against his arch-enemy, Murray Hill, on the high seas and quickly finds himself in hot water as things take a dangerous turn.

New friends and a mystery help Aven, thirteen, adjust to middle school and life at a dying western theme park in a new state, where her being born armless presents many challenges.

The InvestiGators are the best crime-fighting duo in the world. Their greatest nemesis, Crackerdile, has created a team of super villains! Faced with the choice between saving themselves or catching the crooks, can Mango and Brash make sure the gator good prevails?

Billy Dickens discovers that his mysterious father lives in Montana, so this summer, Billy will fly across the country, hike a mountain, float a river, dodge a grizzly bear, shoot down a spy drone, and save his father.

Serafina has never had a reason to disobey her pa and venture beyond the grounds of the Biltmore estate. There’s plenty to explore in her grand home, although she must take care never to be seen. None of the rich folk upstairs know that Serafina exists; she and her pa, the estate’s maintenance man, have secretly lived in the basement for as long as Serafina can remember. But when children at the estate start disappearing, only Serafina knows who the culprit is: a terrifying man in a black cloak who stalks Biltmore’s corridors at night. Serafina risks everything to uncover the Man in the Black Cloak’s true identity before all the children vanish.

After passing a series of mind-bending tests, four children are selected for a secret mission that requires them to go undercover at the Learning Institute for the Very Enlightened, where the only rule is that there are no rules.

In 1766, a boy, Billy Marvel, is shipwrecked, rescued, and goes on to found a brilliant family of actors that flourishes in London until 1900–and nearly a century later, Joseph Jervis runs away from home, seeking refuge with his uncle in London, and is captivated by the Marvel house, with its portraits and ghostly presences.

No mystery is too great for super-sleuth Cam Jansen and her remarkable photographic memory!

Mack Rhino, a private detective, is on the case of a big race in town, and all the runners are missing the laces to their sneakers.

Hamster Holmes and his firefly sidekick, Dr. Watt, enjoy a fair when a friend invites them to race to find a hidden hourglass. Can they solve the word puzzles in time?