The Shadow Cipher


Laura Ruby - 2017
    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. By the present day, however, the puzzle has never been solved, and the greatest mystery of the modern world is little more than a tourist attraction.Tess and Theo Biedermann and their friend Jaime Cruz live in a Morningstarr apartment house—until a real estate developer announces that the city has agreed to sell him the five remaining Morningstarr buildings. Their likely destruction means the end of a dream long-held by the people of New York. And if Tess, Theo and Jaime want to save their home, they have to prove that the Old York Cipher is real. Which means they have to solve it.

Greenglass House


Kate Milford - 2014
    The creaky smuggler’s inn is always quiet during this season, and twelve-year-old Milo, the innkeepers’ adopted son, plans to spend his holidays relaxing. But on the first icy night of vacation, out of nowhere, the guest bell rings. Then rings again. And again. Soon Milo’s home is bursting with odd, secretive guests, each one bearing a strange story that is somehow connected to the rambling old house. As objects go missing and tempers flare, Milo and Meddy, the cook’s daughter, must decipher clues and untangle the web of deepening mysteries to discover the truth about Greenglass House—and themselves.

The Case of the Missing Marquess


Nancy Springer - 2006
    Disguising herself as a grieving widow, Enola sets out to the heart of London to uncover her mother’s whereabouts—but not even the last name Holmes can prepare her for what awaits. Suddenly involved in the kidnapping of the young Marquess of Basilwether, Enola must escape murderous villains, free the spoiled Marquess, and perhaps hardest of all, elude her shrewd older brother—all while collecting clues to her mother’s disappearance!

Dovey Coe


Frances O'Roark Dowell - 2000
    I'm here to lay the record straight, to let you know them folks saying I done a terrible thing are liars. I aim to prove it, too. I hated Parnell Caraway as much as the next person, but I didn't kill him. Dovey Coe says what's on her mind, so it's no secret that she can't stand Parnell Caraway. Parnell may be the son of the richest man in town, but he's mean and snobby, and Dovey can't stand the fact that he's courting her sister, Caroline, or the way he treats her brother, Amos, as if he were stupid just because he can't hear. So when Parnell turns up dead, and Dovey's in the room where his body is discovered, she soon finds herself on trial for murder. Can the outspoken Dovey sit still and trust a city slicker lawyer who's still wet behind the ears to get her out of the biggest mess of her life?

Shirley & Jamila Save Their Summer


Gillian Goerz - 2020
    Sure, Shirley's a little strange, but both girls need a new plan for the summer, and they might as well become friends.Then this kid Oliver shows up begging for Shirley's help. His pet gecko has disappeared, and he's sure it was stolen! That's when Jamila discovers Shirley's secret: She's the neighborhood's best kid detective, and she's on the case. When Jamila discovers she's got some detective skills of her own, a crime-solving partnership is born.The mystery of the missing gecko turns Shirley and Jamila's summer upside down. And when their partnership hits a rough patch, they have to work together to solve the greatest mystery of all: What it means to be a friend.

Inside the Shadow City


Kirsten Miller - 2006
    A million rats, delinquent Girl Scouts out for revenge, and a secret city below the streets of Manhattan combine in this remarkable novel about a darker side of New York City you have only just begun to know about…

Unstoppable Octobia May


Sharon G. Flake - 2014
    Her heart condition makes her special - and, some folks would argue, gives this ten-year-old powers that make her a "wise soul." Thank goodness for Auntie, who convinces Octobia's parents to let her live in her boarding house that is filled with old folks. That's when trouble, and excitement, and wonder begin. Auntie is non-traditional. She's unmarried and has plans to purchase other boarding homes and hotels. At a time when children, and especially girls, are "seen, not heard," Auntie allows Octobia May the freedom and expression of an adult. When Octobia starts to question the folks in her world, an adventure and a mystery unfold that beg some troubling questions: Who is black and who is "passing" for white? What happens when a vibrant African American community must face its own racism?And, perhaps most important: Do vampires really exist?

Operation Trinity


Clifford Riley - 2012
    For 500 years, they've protected the source of their power - the 39 Clues. And for 500 years, they've kept their secrets silent. Until now.This extraordinary stand-alone novel cracks open the Cahill vault to tell the story of the most coveted piece of artwork in the world, a masterpiece that has been the target of seven separate theft attempts: Jan van Eyck’s altarpiece at Ghent. OPERATION TRINITY chronicles the first Vesper attack on the altarpiece in the 1600s, then jumps to WWII and young Grace Cahill’s desperate bid to save the masterwork from the Nazis. The final piece of the novel tells the story of Ian and Natalie Kabra’s first solo operation and features an 11th hour appearance by Grace Cahill on her final mission.History will never be the same.

The Secret Seven


Enid Blyton - 1949
    It's snowing and the Seven are dressed in disguise, following a lead to a spooky old house - and a mystery.

Countdown


Deborah Wiles - 2010
    But that's hard to get when her best friend is feuding with her, her sister has disappeared, and her uncle is fighting an old war in his head. Her saintly younger brother is no help, and the cute boy across the street only complicates things. Worst of all, everyone is walking around just waiting for a bomb to fall. It's 1962, and it seems that the whole country is living in fear. When President Kennedy goes on television to say that Russia is sending nuclear missiles to Cuba, it only gets worse. Franny doesn't know how to deal with what's going on in the world -- no more than she knows how to deal with what's going on with her family and friends. But somehow she's got to make it through. Featuring a captivating story interspersed with footage from 1962, award-winning author Deborah Wiles has created a documentary novel that will put you right alongside Franny as she navigates a dangerous time in both her history and our history.

The Willoughbys


Lois Lowry - 2008
       The Willoughby children—Timothy, twins Barnaby A and Barnaby B, and their sister Jane—are fond all old-fashioned things, but especially old-fashioned adventures. What they aren't fond of, however, are their parents. Truth be told, their parents aren't the fondest of them, either, and they're concocting an evil plan to get rid of their children once and for all!   Both parents and children have plenty of dastardly ideas and tricks up their sleeves. The only thing they don't have is any idea of what lies between them and a happily-ever-after.   Complete with a cheeky glossary and bibliography, this hilarious and wonderfully old-fashioned parody pays playful homage to classic works of children’s literature like Mary Poppins and A Christmas Carol.

Kat, Incorrigible


Stephanie Burgis - 2010
    But with her eldest sister Elissa's intended fiancé, the sinister Sir Neville, showing a dangerous interest in Kat's magical potential; her other sister, Angeline, wreaking romantic havoc with her own witchcraft; and a highwayman lurking in the forest, even Kat's reckless heroism will be tested to the upmost. If she can learn to control her new powers, will Kat be able to rescue her family and win her sisters their true love?

Found


Margaret Peterson Haddix - 2008
    Then he and a new friend, Chip, who's also adopted, begin receiving mysterious letters. The first one says, "You are one of the missing." The second one says, "Beware! They're coming back to get you."Jonah, Chip, and Jonah's sister, Katherine, are plunged into a mystery that involves the FBI, a vast smuggling operation, an airplane that appeared out of nowhere - and people who seem to appear and disappear at will. The kids discover they are caught in a battle between two opposing forces that want very different things for Jonah and Chip's lives.Do Jonah and Chip have any choice in the matter? And what should they choose when both alternatives are horrifying?With Found, Margaret Peterson Haddix begins a new series that promises to be every bit as suspenseful as Among the Hidden, and proves her, once again, to be a master of the page-turner.

Murder Most Unladylike


Robin Stevens - 2014
    When Daisy Wells and Hazel Wong set up a secret detective agency at Deepdean School for Girls, they struggle to find a truly exciting mystery to investigate. (Unless you count the case of Lavinia's missing tie. Which they don't.)But then Hazel discovers the body of the Science Mistress, Miss Bell - but when she and Daisy return five minutes later, the body has disappeared. Now the girls have to solve a murder, and prove a murder has happened in the first place before the killer strikes again (and before the police can get there first, naturally),But will they succeed? And can their friendship stand the test?

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.