The Boundless


Kenneth Oppel - 2014
    When first-class passenger Will Everett gets the key to a train car containing priceless treasures, he becomes the target of sinister figures from his past. To survive, Will joins a travelling circus, helped by ringmaster leader Mr. Dorian, and Maren, a girl his age and an expert escape artist.

The Maze of Bones


Rick Riordan - 2008
    When their beloved aunt--matriarch of the world's most powerful family--dies, orphaned siblings Amy and Dan Cahill compete with less honorable Cahill descendants in a race around the world to find cryptic clues to a mysterious fortune.Book includes game cards which the reader may use to play an online version of the treasure hunt.

The Extraordinary Education of Nicholas Benedict


Trenton Lee Stewart - 2012
    Not only is he an orphan with an unfortunate nose, but he also has narcolepsy, a condition that gives him terrible nightmares and makes him fall asleep at the worst possible moments. Now he's being sent to a new orphanage, where he will encounter vicious bullies, selfish adults, strange circumstances – and a mystery that could change his life forever. Luckily, he does have one thing in his favor: He's a a genius.On his quest to solve the mystery, Nicholas finds enemies around every corner, but also friends in unexpected places – and discovers along the way that the greatest puzzle of all is himself.

The Secret Box


Whitaker Ringwald - 2014
    The page-turning mystery, alternating girl and boy narrators, and clever incorporation of mythology are sure to delight-and lingering questions will leave readers eager for more.On her 12th birthday Jax Malone receives a surprise gift from her estranged Great-Aunt Juniper: a mysterious locked box that will only open in one location. If Jax's mom hadn't tried to return it, Jax would have assumed it was just another boring present to add to the most boring, un-magical birthday ever.Instead, Jax decides she must open the box. So she recruits her reluctant cousin Ethan and his obnoxious, computer-genius older brother Tyler to help find the site where the box will open.But what starts as a fun adventure quickly turns crazy, even dangerous, when Jax, Ethan, and Tyler learn that the box was not intended as a gift, but as a call for help from an ancient magical source thought to only exist in myth."This mystery unfolds before your eyes in a series of cliffhangers that build up to a blow-your-mind ending. Wanting to know the secret kept me turning the pages."-Dan Gutman, New York Times bestselling author of the Genius Files series

Spy School


Stuart Gibbs - 2012
    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 math skills, Ben isn't 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 C.I.A. academy. Could the C.I.A. really want him?Actually, no. There’s been a case of mistaken identity—but that doesn’t stop Ben from trying to morph into a supercool undercover agent, the kind that always gets the girl. And through a series of hilarious misadventures, Ben realizes he might actually be a halfway decent spy…if he can survive all the attempts being made on his life!

The Gathering


Dan Poblocki - 2016
    You step into it.Some houses are more than just haunted... they're hungry. Dash, Dylan, Poppy, Marcus, and Azumi don't know this at first. They each think they've been summoned to Shadow House for innocent reasons. But there's nothing innocent about Shadow House.Something within its walls is wickedly wrong. Nothing -- and nobody -- can be trusted. Hallways move. Doors vanish. Ghosts appear. Children disappear.And the way out?That's disappeared, too...Enter Shadow House... if you dare.Don't just read about Shadow House -- explore its haunted depths with the free app!

The Blackthorn Key


Kevin Sands - 2015
    With time running out, Christopher must use every skill he’s learned to discover the key to a terrible secret with the power to tear the world apart.

Winterborne Home for Vengeance and Valor


Ally Carter - 2020
    But she soon learns that this home isn't like any of the others - especially when she unearths the secret of the missing-and-presumed-dead billionaire, Gabriel Winterborne, who is neither missing nor dead but is actually living in a basement lair, sharpening his swords and looking for vengeance.Now that April knows Gabriel Winterborne is alive, she must turn to the other orphans to keep him that way. As a looming new danger threatens to take Gabriel down once and for all, they must use their individual talents to find a way to make sure this home for misfits isn't lost to them for ever.Because at the Winterborne Home, nothing is what it seems, no one is who they say they are and nowhere is safe. And now a ragtag group of orphans must unravel the riddle of a missing heir, a supposed phantom and a secret key, all without alerting the adults of Winterborne House that trouble is afoot.

Under Their Skin


Margaret Peterson Haddix - 2016
    Well, yes, they will have to move. And they will have a new stepfather, stepbrother, and stepsister. But Mom tells them not to worry. They won't ever have to meet their stepsiblings.This news puzzles Nick and Eryn, so the twins set out on a mission to find out who these kids are - and why they're being kept hidden.

The Medusa Plot


Gordon Korman - 2011
    They thought the hunt for 39 Clues leading to the source of that power was over. They even thought they'd won. But Amy and Dan were wrong.One by one, distress calls start coming in from around the globe. Cahills are being kidnapped by a shadowy group known only as the Vespers. Now Amy and Dan have only days to fulfill a bizarre ransom request or their captured friends will start dying. Amy and Dan don't know what the Vespers want or how to stop them. Only one thing is clear. The Vespers are playing to win, and if they get their hands on the Clues . . . the world will be their next hostage.

The Initiation


Ridley Pearson - 2016
    Set in modern times and focusing on Moriarty's bone-chilling beginnings, this middle grade mystery-adventure series will upend everything you thought you ever knew about Sherlock Holmes—and the true nature of evil.In the pantheon of literature’s more impressive villains, Sherlock Holmes’s greatest nemesis, James Moriarty, stands alone. As Sir Arthur Conan Doyle describes him in the classic tale “The Final Solution,” Moriarty is a genius, a philosopher, and a spider in the center of his web. He is the Napolean of crime—and now, for the first-time ever, New York Times bestselling novelist Ridley Pearson explores the origins of his evil ways.Our story begins when James and his younger sister, Moria, are unceremoniously sent off to boarding school at Baskerville Academy. It is not a fate either want or welcome—but generations of Moriarty men have graduated from Baskerville’s hallowed halls. And now so too must James. It’s at Baskerville where James is first paired with a rather unexpected roommate—Sherlock Holmes. The two don’t get along almost instantly, but when the school’s heirloom Bible goes missing and cryptic notes with disconcerting clues start finding their way into James’s hands, the two boys decide that they must work together to solve a mystery so fraught with peril, it will change both their lives forever!It’s another seat-of-your-pants mystery from the bestselling author of Peter and the Starcatchers and The Kingdom Keepers series, Ridley Pearson.

The Aviary


Kathleen O'Dell - 2011
    Clara has never known another home. In fact, she's confined to the grand estate due to a mysterious heart condition. But it's a comfortable life, and if it weren't for the creepy squawking birds in the aviary out back, a completely peaceful one too. But once old Mrs. Glendoveer passes away, Clara comes to learn many dark secrets about the family. The Glendoveers suffered a horrific tragedy: their children were kidnapped, then drowned. And their father George Glendoveer, a famous magician and illusionist, stood accused until his death. As Clara digs deeper and deeper into the terrifying events, the five birds in the aviary seem to be trying to tell her something. And Clara comes to wonder: what is their true identity? Clara sets out to solve a decades-old murder mystery—and in doing so, unlocks a secret in her own life, too. Kathleen O'Dell deftly weaves magic, secret identities, evil villians, unlikely heroes, and the wonder of friendship into a mystery adventure with all the charm of an old fashioned classic.

Serafina and the Black Cloak


Robert Beatty - 2015
    There’s plenty to explore in her grand home, although she must take care to never 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. Following her own harrowing escape, Serafina risks everything by joining forces with Braeden Vanderbilt, the young nephew of the Biltmore’s owners. Braeden and Serafina must uncover the Man in the Black Cloak’s true identity... before all of the children vanish one by one.Serafina’s hunt leads her into the very forest that she has been taught to fear. There she discovers a forgotten legacy of magic, one that is bound to her own identity. In order to save the children of Biltmore, Serafina must seek the answers that will unlock the puzzle of her past.

Beneath


Roland Smith - 2009
    He's even helped Coop with some of his crazier plans -- such as risking his life to help his big brother dig a tunnel underneath their neighborhood in the suburbs of Washington, DC. Coop is . . . different. He doesn't talk on the phone, doesn't use email, and doesn't have friends. He's never really cared for anything but the thrill of being underground and Pat. So it's no surprise to anyone -- even Pat -- that after a huge fight with their parents, Coop runs away. Exactly one year later, Pat receives a package containing a digital voice recorder and a cryptic message from his brother. He follows the clues to New York City, and soon discovers that Coop has joined the Community, a self-sufficient society living beneath the streets. Now it's up to Pat to find his brother -- and bring him home.

The Nethergrim


Matthew Jobin - 2014
    But it’s when a group of children disappear that they know for sure: The Nethergrim has returned.Edmund’s brother is one of the missing, and Edmund knows he must do something to save his life. But what? Though a student of magic, he struggles to cast even the simplest spell.Still, he and his friends swallow their fear and set out to battle an ancient evil whose powers none of them can imagine.