In the dazzling conclusion to the Greystone Secrets series from New York Times best-selling author Margaret Peterson Haddix, the Greystones and their doubles, the Gustanos, must team up to save the alternate world - before both worlds are lost. All secrets are revealed in this addictive, suspenseful story that shows the importance of teamwork, telling your story, and taking action when it matters most. 

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. 

One minute they’re there: laughing and having fun at the house next door. The next minute, the teens are gone. Like magic. Marin can’t believe her eyes. Who are they? Can anyone else see them? What makes them so happy? Marin is lonely in this new town of hers and eager to figure out more. Then she meets Charley, who reveals that he knows about them, too. He calls them the “Remarkables”. Charley warns her to stay away from the Remarkables - and him.

No matter what anyone tells you, I’m real. That’s what the note says that Max finds under his keyboard. He knows that his best friend, Josie, wrote it. He’d know her handwriting anywhere. But why she wrote it - and what it means - remains a mystery. Ever since they met in kindergarten, Max and Josie have been inseparable. Until the summer after fifth grade, when Josie disappears, leaving only a note, and whispering something about “whatnot rules”. But why would Max ever think that Josie wasn’t real? And what are whatnots?

Nina Idi - a third child in a society where families are allowed only two children - has been betrayed by the boy she loved and arrested by the Population Police for exposing other alleged third children. Angry and confused, Nina knows only one thing for sure: She is innocent of the charges. But now she is faced with the most difficult choice of her life: Get three other prisoners to admit they are shadow children and be spared herself, or refuse to cooperate and be killed. The options are clear. The choice, Nina discovers, is not.

Alex’s original hair-raising tales are the only thing keeping the witch Natacha happy, but soon he’ll run out of pages to read from and be trapped forever. He’s loved scary stories his whole life, and he knows most don’t have a happily ever after. Now that Alex is trapped in a true terrifying tale, he’s desperate for a different ending - and a way out of this twisted place. This modern spin on the Scheherazade story is perfect for fans of Coraline and A Tale Dark and Grimm.

For the past 12 years, adults called "Freds" have raised Rosi, her younger brother Bobo, and the other children of their town, saying it is too dangerous for them to stay with their parents - but now they are all being sent back. Since Rosi is the oldest, all the younger kids are looking to her with questions she doesn't have the answers to. She'd always trusted the Freds completely, but now she's not so sure. And their home is nothing like she'd expected, like nothing the Freds had prepared them for.

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.

With a dad who disappeared years ago and a mother who's a bit too busy to parent, Emmy is shipped off to Wellsworth, a prestigious boarding school in England, where she's sure she won't fit in. But then she finds a box of mysterious medallions in the attic of her home - medallions that belonged to her father...who may have gone to Wellsworth.

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.

After tracking down incredible discoveries by Einstein and Darwin, Charlie is back. This time, the great ruler Cleopatra has left behind an extremely valuable and powerful treasure, its location encoded on an ancient stone tablet. In 30 BCE, Cleopatra and her husband, Marc Antony, lost their war against Octavian for control of the Egyptian Empire. However, Cleopatra knew Octavian was really after the mysterious item that was the source of all her wealth and influence, so she hid it before committing suicide. 

It's wintertime at Greenglass House. The creaky smuggler's inn is always quiet during this season, and 12-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.

After surviving an infamous family tragedy, 16-year-old Kennedy Jones has made it her mission to keep her brother's search through the cosmos alive. But then something disturbs the frequency on his radio telescope - a pattern registering where no signal should transmit. In a neighboring county, 17-year-old Nolan Chandler is determined to find out what really happened to his brother, who disappeared the day after Nolan had an eerie premonition. There hasn't been a single lead for two years, until Nolan picks up an odd signal - a pattern coming from his brother's bedroom.

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....

A hilarious new middle grade novel from beloved and best-selling author Gordon Korman about what happens when the worst class of kids in school is paired with the worst teacher. The Unteachables never thought they’d find a teacher who had a worse attitude than they did. And Mr. Kermit never thought he would actually care about teaching again. Over the course of a school year, though, room 117 will experience mayhem, destruction - and maybe even a shot at redemption.