Amy and Dan Cahill face their greatest challenge on their quest to find the thirty-nine clues, but in order to discover the secrets of their lineage they will have to make a choice that could impact the world's future.

Eleven-year-old Marin and her neighbor Charley hope that by preventing a disaster that occurred twenty years ago, they can save Charley's dad from a future of guilt and self-destructive behavior.

Time travelers Jonah and Katherine arrive in 1611 to rescue John Hudson, the missing son of explorer Henry Hudson, but just as the mutiny on the "Discovery" is supposed to start, Jonah and Katherine's knowledge of history is tested once again and they fear that more is at stake than just one boy's life. Includes facts about Henry Hudson's explorations.

When Jonah and Katherine travel to early 1900s Switzerland and Serbia to return Albert Einstein's daughter, Lieserl, to history, her mother Mileva grasps entirely too much about time travel and has no intention of letting her daughter go.

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 has been inseparable....

Return to the classic middle grade time-bending thriller Running Out of Time by Margaret Peterson Haddix, almost thirty years following its first publication, with this stunning repackage. Clifton, Indiana, 1840. Jessie Keyser lives with her family in a small log cabin. Her father is a blacksmith and her mother cares for her and her siblings—though, at night, Jessie’s mother also secretly tends anyone who gets sick in their village. Lately,...

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,...

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...

Ella Brown is unhappy. Shivering cold in her luxurious bed, she's afraid to get up and light the fire, because she's recently been scolded for doing things servants are supposed to do. New to the castle, Ella is having trouble adjusting to her unfamiliar role: Princess. In this wonderful continuation of the Cinderella story, award-winning author Margaret Haddix imagines a heroine who has gotten what she wants, not through some fairy godmother's magical...

What does it mean to save yourself? 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...