New York Times bestselling author Margaret Peterson Haddix takes readers on a thrilling adventure filled with mysteries and plot twists aplenty in this absorbing series about family and friendships. Perfect for fans of A Wrinkle in Time and The City of Ember!

What makes you you?

The Greystone kids thought they knew. 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?

Before Chess, Emma, and Finn can question their mom about it, she takes off on a sudden work trip and leaves them in the care of Ms. Morales and her daughter, Natalie. But puzzling clues left behind lead to complex codes, hidden rooms, and a dangerous secret that will turn their world upside down.

Praise for The Strangers:

"A secret-stacked, thrilling series opener about perception, personal memories, and the idiosyncrasies that form individual identities." (Publishers Weekly, starred review)

* Winter 2018–2019 Kids' Indie Next List Pick * Indie Bestseller * Time for Kids Book Club: Top 10 Summer Reads *  PW Best Books 2019 *  Texas Bluebonnet Award List 2020-2021 * 2020 LITA Excellence in Children’s and Young Adult Science Fiction Notable Book: The Eleanor Cameron Notable Middle Grade Books List *

The second book in the Greystone Secrets series from the master of plot twists, Margaret Peterson Haddix—perfect for fans of A Wrinkle in Time and The City of Ember! 

Until their mother vanished, the Greystone kids—Chess, Emma, and Finn—knew nothing about the other world.

Everything is different there. It’s a mirror image, except things are wrong. Evil. Their mother tried to fix it, but she and an ally got trapped there along with Ms. Morales, their friend Natalie’s mom.

Now the four kids—brave Chess, smart Emma, kind Finn, and savvy Natalie—are determined to rescue everyone.

To do so, they have to go back: into the other world, where even telling the truth can be illegal.

But in such a terrifying place, Chess doubts he can ever be brave enough. Despite all her brains, Emma can’t seem to break the code. With everything spiraling out of control, Finn has to pretend he’s okay.

And for Natalie, the lies of the other world include some she wishes were actually true. What if she’s gotten so used to lying she no longer knows what to believe?

The second book in the Greystone Secrets series, The Deceivers, by bestselling author Margaret Peterson Haddix, continues the twisty and suspenseful story of the Greystone kids and examines the power of the truth—or a lie—to alter lives, society, and even an entire reality.

Praise for Greystone Secrets #1: The Strangers

*Winter 2018-2019 Kids' Indie Next List Pick*

“A secret-stacked, thrilling series opener.” —Publishers Weekly, starred review

“An engrossing mystery with a cliff-hanger ending to raise the stakes and delight fans new and old.” —Booklist

“Maintains suspense from the beginning to the cliffhanger ending. A high-stakes adventure full of teamwork with a multifaceted mystery and complex themes.” —Kirkus Reviews

In the dazzling conclusion to the Greystone Secrets series from New York Times bestselling 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 page-turning, suspenseful story that shows the importance of teamwork, telling your story, and taking action when it matters most.

As book three of the Greystone Secrets series opens, the Greystone kids have their mother back from the evil alternate world, and so does their friend Natalie. But no one believes the danger is past.

Then mysterious coins begin falling from unexpected places. They are inscribed with codes that look just like what the Greystones’ father was working on before he died. And with the right touch, those symbols transform into words: PLEASE LISTEN. And FIND US, SEE US, HELP US. . . .

The coins are messengers, telling the Greystones and their allies that their friends in the alternate world are under attack—and that the cruel, mind-controlling forces are now invading the better world, too.

After another spinning, sliding journey across worlds, the Greystone kids must solve mysteries that have haunted them since the beginning: what happened when the Gustanos were kidnapped, what created the alternate world, and how a group of mismatched kids can triumph once and for all against an evil force that seems to have total control.

In this page-turning middle grade series by New York Times bestseller Margaret Peterson Haddix, Colin and Nevaeh, whose parents own rival junk-removal businesses, uncover mysteries hidden in attics and basements and discover how trash can become treasure. In The Secret Letters, Colin and Nevaeh find vintage letters that lead to interlocking mysteries from the 1970s and ‘80s, and they learn about “women’s lib,” the ERA, and other social issues from that time in history—and the way echoes from that era affect Colin and Nevaeh themselves.

When Colin finds a shoebox full of letters hidden in a stranger’s attic, he knows he’s supposed to throw them away. That’s his summer job, getting rid of junk. But Colin wants to rescue the letters--and find out what really happened to best friends Rosemary and Toby way back in the 1970s.

Meanwhile, across town, Nevaeh also finds a mysterious letter. But this one reads like a confession to a crime. And Nevaeh knows her father, the “Junk King,” expects her to join the rest of the family in blaming a single suspect: his business rival, Colin’s mom.

But that’s not what Nevaeh wants, either.

Even as one set of letters bring Colin and Nevaeh together, the one Nevaeh found threatens to tear them apart. Is their new friendship as doomed as Rosemary and Toby’s?

Each book in the Mysteries of Trash and Treasure series will examine a different time period in history and make readers think about how we value the stuff we hold on to—and what it is that makes it valuable.

From master of suspense author Margaret Peterson Haddix comes another page-turning stand-alone adventure perfect for fans of Cog and Bad Magic.

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?

As Max sets to uncover what happened to Josie—and what she is or isn’t—little does he know that she’s fighting to find him again, too. But there are forces trying to keep Max and Josie from ever seeing each other again. Because Josie wasn’t supposed to be real.

This middle grade thriller from Margaret Peterson Haddix delves into the power of privilege, the importance of true friendship, and the question of humanity and identity. Because when anyone could be a whatnot, what makes a person a real friend—or real at all?

New York Times bestselling author Margaret Peterson Haddix, the master of cliffhangers, delivers a pulse-pounding mystery perfect for fans of Jacqueline West and Kat Yeh, full of secrets, surprises, and the power of 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. Charley and Marin both have painful secrets they’re holding on to, but could solving the mystery of the Remarkables help them both?

In addition to building an intriguing world filled with mystery, Haddix also grounds the story with real issues that many children face. Characters deal with the complexities of bullying, the guilt children experience when parents have addiction issues, and the uplifting power found in strong families of all shapes and sizes.