Margaret Peterson Haddix

"Luke has never been to school. He's never had a birthday party, or gone to a friend's house for an overnight. In fact, Luke has never had a friend. Luke is one of the shadow children, a third child forbidden by the Population Police. He's lived his entire life in hiding, and now, with a new housing development replacing the woods next to his family's farm, he is no longer even allowed to go outside. Then, one day Luke sees a girl's face in the window...

"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...

"Thirteen-year-old Jonah has always known that he was adopted, and he's never thought it was any big deal. 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, and an airplane that...

"Jonah, Katherine, Chip, and another boy, Alex, have no preparation before they are sent back to 1483 at the Tower of London, with the promise that they can return to the present if they can repair history. They quickly discover that Chip and Alex’s true identities are the 13-year-old King Edward V and his 10-year-old brother, Richard, Duke of York. But before Chip can enjoy being the king of England, they discover that they are virtually prisoners—and...

Being a princess isn't all that....
You've heard the fairytale: a glass slipper, Prince Charming, happily ever after...
Welcome to reality: royal genealogy lessons, needlepoint, acting like "a proper lady," and — worst of all — a prince who is not the least bit interesting, and certainly not charming.
As soon-to-be princess Ella deals with her newfound status, she comes to realize she is not "your majesty" material. But...

When a diphtheria epidemic hits her 1840 village, thirteen-year-old Jessie discovers it is actually a 1995 tourist site under unseen observation by heartless scientists, and it's up to Jessie to escape the village and save the lives of the dying children.

"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,...

"Matthias, an illegal third child, is caught in the cross fire between rebels and the Population Police. When he unwittingly saves a Population Police officer, Matthias is brought to Population Police headquarters to train as an officer himself. There he meets Nina, another third-born who enlists his help in a plot to undermine the Population Police. But Matthias is under constant scrutiny, and he has no idea whom he can trust. What can one boy do...

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.

"Luke Garner is an illegal third child. All his life has been spent in hiding. Now, for the first time, Luke is living among others. He has assumed a deceased boy's identity and is attending Hendricks School for Boys, a window-less building with cruel classmates and oblivious teachers. Luke knows he has to blend in, but he lives in constant fear that his behavior will betray him. Then one day Luke discovers a door to the outside. He knows that beyond...